CWE-94
Allowed-with-ReviewImproper Control of Generation of Code ('Code Injection')
Abstraction: Base · Status: Draft
The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.
8272 vulnerabilities reference this CWE, most recent first.
GHSA-H6JG-7G8R-WGQW
Vulnerability from github – Published: 2026-05-27 09:31 – Updated: 2026-05-27 09:31The affiliate-toolkit plugin for WordPress is vulnerable to remote code execution in all versions up to, and including, 3.8.5. This is due to the plugin using the BladeOne templating engine's runString() method which compiles user-supplied template content into PHP code and executes it via eval() without sanitization or sandboxing. This makes it possible for authenticated attackers, with Editor-level access and above, to execute arbitrary code on the server by injecting PHP into a plugin template.
{
"affected": [],
"aliases": [
"CVE-2026-6169"
],
"database_specific": {
"cwe_ids": [
"CWE-94"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-05-27T08:16:44Z",
"severity": "HIGH"
},
"details": "The affiliate-toolkit plugin for WordPress is vulnerable to remote code execution in all versions up to, and including, 3.8.5. This is due to the plugin using the BladeOne templating engine\u0027s runString() method which compiles user-supplied template content into PHP code and executes it via eval() without sanitization or sandboxing. This makes it possible for authenticated attackers, with Editor-level access and above, to execute arbitrary code on the server by injecting PHP into a plugin template.",
"id": "GHSA-h6jg-7g8r-wgqw",
"modified": "2026-05-27T09:31:15Z",
"published": "2026-05-27T09:31:15Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-6169"
},
{
"type": "WEB",
"url": "https://plugins.trac.wordpress.org/browser/affiliate-toolkit-starter/tags/3.8.5/includes/atkp_posttypes_template.php#L735"
},
{
"type": "WEB",
"url": "https://plugins.trac.wordpress.org/browser/affiliate-toolkit-starter/tags/3.8.5/includes/helper/atkp_template_helper.php#L1074"
},
{
"type": "WEB",
"url": "https://plugins.trac.wordpress.org/browser/affiliate-toolkit-starter/tags/3.8.5/lib/bladeone/BladeOne.php#L320"
},
{
"type": "WEB",
"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/b6310a0c-5a96-4dbc-940e-025c9b907c7d?source=cve"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-H6JH-CF83-QCQ5
Vulnerability from github – Published: 2023-05-24 09:30 – Updated: 2023-05-31 15:57nilsteampassnet/teampass prior to 3.0.9 is vulnerable to code injection. A malicious user could potentially rename a folder with a payload containing malicious code. This could result in an attack on an admin who edits the folder, as the payload could execute upon the admin's interaction with the folder. This attack could potentially allow the attacker to gain unauthorized access to the admin's system or steal sensitive information, or it could force admin to get redirected to a website controlled by the attacker.
{
"affected": [
{
"package": {
"ecosystem": "Packagist",
"name": "nilsteampassnet/teampass"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "3.0.9"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2023-2859"
],
"database_specific": {
"cwe_ids": [
"CWE-94"
],
"github_reviewed": true,
"github_reviewed_at": "2023-05-24T17:32:25Z",
"nvd_published_at": "2023-05-24T08:15:09Z",
"severity": "HIGH"
},
"details": "nilsteampassnet/teampass prior to 3.0.9 is vulnerable to code injection. A malicious user could potentially rename a folder with a payload containing malicious code. This could result in an attack on an admin who edits the folder, as the payload could execute upon the admin\u0027s interaction with the folder. This attack could potentially allow the attacker to gain unauthorized access to the admin\u0027s system or steal sensitive information, or it could force admin to get redirected to a website controlled by the attacker. ",
"id": "GHSA-h6jh-cf83-qcq5",
"modified": "2023-05-31T15:57:56Z",
"published": "2023-05-24T09:30:25Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-2859"
},
{
"type": "WEB",
"url": "https://github.com/nilsteampassnet/teampass/commit/1f51482a0c4d152ca876844212b0f8f3cb9387af"
},
{
"type": "PACKAGE",
"url": "https://github.com/nilsteampassnet/teampass"
},
{
"type": "WEB",
"url": "https://huntr.dev/bounties/d7b8ea75-c74a-4721-89bb-12e5c80fb0ba"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N",
"type": "CVSS_V3"
}
],
"summary": "Code injection in nilsteampassnet/teampass"
}
GHSA-H6JJ-C8M5-8JH5
Vulnerability from github – Published: 2022-05-17 05:36 – Updated: 2022-05-17 05:36remote_support.cgi in the Tadasoft Restorepoint 3.2 evaluation image allows remote attackers to execute arbitrary commands via shell metacharacters in the (1) pid1 or (2) pid2 parameter in a stop_remote_support action.
{
"affected": [],
"aliases": [
"CVE-2011-4201"
],
"database_specific": {
"cwe_ids": [
"CWE-94"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2011-12-13T11:55:00Z",
"severity": "HIGH"
},
"details": "remote_support.cgi in the Tadasoft Restorepoint 3.2 evaluation image allows remote attackers to execute arbitrary commands via shell metacharacters in the (1) pid1 or (2) pid2 parameter in a stop_remote_support action.",
"id": "GHSA-h6jj-c8m5-8jh5",
"modified": "2022-05-17T05:36:20Z",
"published": "2022-05-17T05:36:20Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2011-4201"
},
{
"type": "WEB",
"url": "https://www.trustmatta.com/advisories/MATTA-2011-003.txt"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-H6PC-FW8M-G3XJ
Vulnerability from github – Published: 2022-05-17 00:24 – Updated: 2022-05-17 00:24A remote code execution vulnerability in HP UCMDB Foundation Software versions 10.10, 10.11, 10.20, 10.21, 10.22, 10.30, 10.31, 10.32, and 10.33, could be remotely exploited to allow code execution.
{
"affected": [],
"aliases": [
"CVE-2017-14353"
],
"database_specific": {
"cwe_ids": [
"CWE-94"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2017-10-05T15:29:00Z",
"severity": "HIGH"
},
"details": "A remote code execution vulnerability in HP UCMDB Foundation Software versions 10.10, 10.11, 10.20, 10.21, 10.22, 10.30, 10.31, 10.32, and 10.33, could be remotely exploited to allow code execution.",
"id": "GHSA-h6pc-fw8m-g3xj",
"modified": "2022-05-17T00:24:43Z",
"published": "2022-05-17T00:24:43Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-14353"
},
{
"type": "WEB",
"url": "https://softwaresupport.hpe.com/km/KM02977984"
},
{
"type": "WEB",
"url": "https://www.auscert.org.au/bulletins/53150"
},
{
"type": "WEB",
"url": "https://www.tenable.com/security/research/tra-2017-32"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/101251"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-H6VP-XG23-HPM2
Vulnerability from github – Published: 2022-05-02 06:20 – Updated: 2022-05-02 06:20Unspecified vulnerability in Microsoft IIS 6.0, 7.0, and 7.5, when Extended Protection for Authentication is enabled, allows remote authenticated users to execute arbitrary code via unknown vectors related to "token checking" that trigger memory corruption, aka "IIS Authentication Memory Corruption Vulnerability."
{
"affected": [],
"aliases": [
"CVE-2010-1256"
],
"database_specific": {
"cwe_ids": [
"CWE-94"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2010-06-08T20:30:00Z",
"severity": "HIGH"
},
"details": "Unspecified vulnerability in Microsoft IIS 6.0, 7.0, and 7.5, when Extended Protection for Authentication is enabled, allows remote authenticated users to execute arbitrary code via unknown vectors related to \"token checking\" that trigger memory corruption, aka \"IIS Authentication Memory Corruption Vulnerability.\"",
"id": "GHSA-h6vp-xg23-hpm2",
"modified": "2022-05-02T06:20:40Z",
"published": "2022-05-02T06:20:40Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2010-1256"
},
{
"type": "WEB",
"url": "https://docs.microsoft.com/en-us/security-updates/securitybulletins/2010/ms10-040"
},
{
"type": "WEB",
"url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/58864"
},
{
"type": "WEB",
"url": "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7149"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/40573"
},
{
"type": "WEB",
"url": "http://www.us-cert.gov/cas/techalerts/TA10-159B.html"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-H75M-HFPM-QX46
Vulnerability from github – Published: 2022-05-01 07:44 – Updated: 2022-05-01 07:44Multiple PHP remote file inclusion vulnerabilities in phpBurningPortal quiz-modul 1.0.1, and possibly earlier, allow remote attackers to execute arbitrary PHP code via a URL in the lang_path parameter to (1) quest_delete.php, (2) quest_edit.php, or (3) quest_news.php.
{
"affected": [],
"aliases": [
"CVE-2006-7102"
],
"database_specific": {
"cwe_ids": [
"CWE-94"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2007-03-03T21:19:00Z",
"severity": "HIGH"
},
"details": "Multiple PHP remote file inclusion vulnerabilities in phpBurningPortal quiz-modul 1.0.1, and possibly earlier, allow remote attackers to execute arbitrary PHP code via a URL in the lang_path parameter to (1) quest_delete.php, (2) quest_edit.php, or (3) quest_news.php.",
"id": "GHSA-h75m-hfpm-qx46",
"modified": "2022-05-01T07:44:46Z",
"published": "2022-05-01T07:44:46Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2006-7102"
},
{
"type": "WEB",
"url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/29558"
},
{
"type": "WEB",
"url": "https://www.exploit-db.com/exploits/2563"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/20547"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-H779-M55X-X42Q
Vulnerability from github – Published: 2025-09-24 15:31 – Updated: 2025-09-24 15:31NVIDIA Megatron-LM for all platforms contains a vulnerability in the msdp preprocessing script where malicious data created by an attacker may cause an injection. A successful exploit of this vulnerability may lead to code execution, escalation of privileges, Information disclosure, and data tampering.
{
"affected": [],
"aliases": [
"CVE-2025-23353"
],
"database_specific": {
"cwe_ids": [
"CWE-94"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-09-24T14:15:49Z",
"severity": "HIGH"
},
"details": "NVIDIA Megatron-LM for all platforms contains a vulnerability in the msdp preprocessing script where malicious data created by an attacker may cause an injection. A successful exploit of this vulnerability may lead to code execution, escalation of privileges, Information disclosure, and data tampering.",
"id": "GHSA-h779-m55x-x42q",
"modified": "2025-09-24T15:31:14Z",
"published": "2025-09-24T15:31:14Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-23353"
},
{
"type": "WEB",
"url": "https://nvidia.custhelp.com/app/answers/detail/a_id/5698"
},
{
"type": "WEB",
"url": "https://www.cve.org/CVERecord?id=CVE-2025-23353"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-H78C-2562-6C4V
Vulnerability from github – Published: 2022-05-01 07:01 – Updated: 2022-05-01 07:01PHP remote file inclusion vulnerability in Basic Analysis and Security Engine (BASE) 1.2.4 and earlier, with register_globals enabled, allows remote attackers to execute arbitrary PHP code via a URL in the BASE_path parameter to (1) base_qry_common.php, (2) base_stat_common.php, and (3) includes/base_include.inc.php.
{
"affected": [],
"aliases": [
"CVE-2006-2685"
],
"database_specific": {
"cwe_ids": [
"CWE-94"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2006-05-31T10:06:00Z",
"severity": "MODERATE"
},
"details": "PHP remote file inclusion vulnerability in Basic Analysis and Security Engine (BASE) 1.2.4 and earlier, with register_globals enabled, allows remote attackers to execute arbitrary PHP code via a URL in the BASE_path parameter to (1) base_qry_common.php, (2) base_stat_common.php, and (3) includes/base_include.inc.php.",
"id": "GHSA-h78c-2562-6c4v",
"modified": "2022-05-01T07:01:24Z",
"published": "2022-05-01T07:01:24Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2006-2685"
},
{
"type": "WEB",
"url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/26652"
},
{
"type": "WEB",
"url": "https://www.exploit-db.com/exploits/1823"
},
{
"type": "WEB",
"url": "http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=370576"
},
{
"type": "WEB",
"url": "http://secunia.com/advisories/20300"
},
{
"type": "WEB",
"url": "http://sourceforge.net/forum/forum.php?forum_id=577228"
},
{
"type": "WEB",
"url": "http://www.osvdb.org/25770"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/18298"
},
{
"type": "WEB",
"url": "http://www.vupen.com/english/advisories/2006/1996"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-H78C-F929-FMWG
Vulnerability from github – Published: 2022-05-17 01:48 – Updated: 2022-05-17 01:48Multiple PHP remote file inclusion vulnerabilities in Nova CMS allow remote attackers to execute arbitrary PHP code via a URL in the (1) fileType parameter to optimizer/index.php, (2) id parameter to administrator/modules/moduleslist.php, (3) filename parameter to includes/function/gets.php, or (4) conf[blockfile] parameter to includes/function/usertpl.php.
{
"affected": [],
"aliases": [
"CVE-2012-1200"
],
"database_specific": {
"cwe_ids": [
"CWE-94"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2012-02-18T00:55:00Z",
"severity": "HIGH"
},
"details": "Multiple PHP remote file inclusion vulnerabilities in Nova CMS allow remote attackers to execute arbitrary PHP code via a URL in the (1) fileType parameter to optimizer/index.php, (2) id parameter to administrator/modules/moduleslist.php, (3) filename parameter to includes/function/gets.php, or (4) conf[blockfile] parameter to includes/function/usertpl.php.",
"id": "GHSA-h78c-f929-fmwg",
"modified": "2022-05-17T01:48:24Z",
"published": "2022-05-17T01:48:24Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2012-1200"
},
{
"type": "WEB",
"url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/73159"
},
{
"type": "WEB",
"url": "http://packetstormsecurity.org/files/109669/Nova-CMS-Remote-File-Inclusion.html"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/51976"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-H78Q-JXM5-WH6G
Vulnerability from github – Published: 2022-05-01 23:33 – Updated: 2022-05-01 23:33Multiple PHP remote file inclusion vulnerabilities in LookStrike Lan Manager 0.9 allow remote attackers to execute arbitrary PHP code via a URL in the sys_conf[path][real] parameter to (1) modules\class\Table.php; (2) db_admins.php, (3) db_alert.php, (4) db_double.php, (5) db_games.php, (6) db_matches.php, (7) db_match_teams.php, (8) db_news.php, (9) db_platform.php, (10) db_players.php, (11) db_server_group.php, (12) db_server_ip.php, (13) db_teams.php, (14) db_team_players.php, (15) db_tournaments.php, (16) db_tournament_teams.php, and (17) db_trees.php in modules\class\db\; and (18) Match.php, (19) MatchTeam.php, (20) Rule.php, (21) RuleBuilder.php, (22) RulePool.php, (23) RuleSingle.php, (24) RuleTree.php, (25) Tournament.php, (26) TournamentTeam.php, (27) Tree.php, and (28) TreeSingle.php in modules\class\tournament. NOTE: this can also be leveraged to include and execute arbitrary local files via directory traversal sequences.
{
"affected": [],
"aliases": [
"CVE-2008-0803"
],
"database_specific": {
"cwe_ids": [
"CWE-94"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2008-02-15T22:00:00Z",
"severity": "HIGH"
},
"details": "Multiple PHP remote file inclusion vulnerabilities in LookStrike Lan Manager 0.9 allow remote attackers to execute arbitrary PHP code via a URL in the sys_conf[path][real] parameter to (1) modules\\class\\Table.php; (2) db_admins.php, (3) db_alert.php, (4) db_double.php, (5) db_games.php, (6) db_matches.php, (7) db_match_teams.php, (8) db_news.php, (9) db_platform.php, (10) db_players.php, (11) db_server_group.php, (12) db_server_ip.php, (13) db_teams.php, (14) db_team_players.php, (15) db_tournaments.php, (16) db_tournament_teams.php, and (17) db_trees.php in modules\\class\\db\\; and (18) Match.php, (19) MatchTeam.php, (20) Rule.php, (21) RuleBuilder.php, (22) RulePool.php, (23) RuleSingle.php, (24) RuleTree.php, (25) Tournament.php, (26) TournamentTeam.php, (27) Tree.php, and (28) TreeSingle.php in modules\\class\\tournament\\. NOTE: this can also be leveraged to include and execute arbitrary local files via directory traversal sequences.",
"id": "GHSA-h78q-jxm5-wh6g",
"modified": "2022-05-01T23:33:24Z",
"published": "2022-05-01T23:33:24Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2008-0803"
},
{
"type": "WEB",
"url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/40519"
},
{
"type": "WEB",
"url": "https://www.exploit-db.com/exploits/5121"
}
],
"schema_version": "1.4.0",
"severity": []
}
Mitigation
Strategy: Refactoring
Refactor your program so that you do not have to dynamically generate code.
Mitigation
- Run your code in a "jail" or similar sandbox environment that enforces strict boundaries between the process and the operating system. This may effectively restrict which code can be executed by your product.
- Examples include the Unix chroot jail and AppArmor. In general, managed code may provide some protection.
- This may not be a feasible solution, and it only limits the impact to the operating system; the rest of your application may still be subject to compromise.
- Be careful to avoid CWE-243 and other weaknesses related to jails.
Mitigation MIT-5
Strategy: Input Validation
- Assume all input is malicious. Use an "accept known good" input validation strategy, i.e., use a list of acceptable inputs that strictly conform to specifications. Reject any input that does not strictly conform to specifications, or transform it into something that does.
- When performing input validation, consider all potentially relevant properties, including length, type of input, the full range of acceptable values, missing or extra inputs, syntax, consistency across related fields, and conformance to business rules. As an example of business rule logic, "boat" may be syntactically valid because it only contains alphanumeric characters, but it is not valid if the input is only expected to contain colors such as "red" or "blue."
- Do not rely exclusively on looking for malicious or malformed inputs. This is likely to miss at least one undesirable input, especially if the code's environment changes. This can give attackers enough room to bypass the intended validation. However, denylists can be useful for detecting potential attacks or determining which inputs are so malformed that they should be rejected outright.
- To reduce the likelihood of code injection, use stringent allowlists that limit which constructs are allowed. If you are dynamically constructing code that invokes a function, then verifying that the input is alphanumeric might be insufficient. An attacker might still be able to reference a dangerous function that you did not intend to allow, such as system(), exec(), or exit().
Mitigation
Use dynamic tools and techniques that interact with the product using large test suites with many diverse inputs, such as fuzz testing (fuzzing), robustness testing, and fault injection. The product's operation may slow down, but it should not become unstable, crash, or generate incorrect results.
Mitigation MIT-32
Strategy: Compilation or Build Hardening
Run the code in an environment that performs automatic taint propagation and prevents any command execution that uses tainted variables, such as Perl's "-T" switch. This will force the program to perform validation steps that remove the taint, although you must be careful to correctly validate your inputs so that you do not accidentally mark dangerous inputs as untainted (see CWE-183 and CWE-184).
Mitigation MIT-32
Strategy: Environment Hardening
Run the code in an environment that performs automatic taint propagation and prevents any command execution that uses tainted variables, such as Perl's "-T" switch. This will force the program to perform validation steps that remove the taint, although you must be careful to correctly validate your inputs so that you do not accidentally mark dangerous inputs as untainted (see CWE-183 and CWE-184).
Mitigation
For Python programs, it is frequently encouraged to use the ast.literal_eval() function instead of eval, since it is intentionally designed to avoid executing code. However, an adversary could still cause excessive memory or stack consumption via deeply nested structures [REF-1372], so the python documentation discourages use of ast.literal_eval() on untrusted data [REF-1373].
CAPEC-242: Code Injection
An adversary exploits a weakness in input validation on the target to inject new code into that which is currently executing. This differs from code inclusion in that code inclusion involves the addition or replacement of a reference to a code file, which is subsequently loaded by the target and used as part of the code of some application.
CAPEC-35: Leverage Executable Code in Non-Executable Files
An attack of this type exploits a system's trust in configuration and resource files. When the executable loads the resource (such as an image file or configuration file) the attacker has modified the file to either execute malicious code directly or manipulate the target process (e.g. application server) to execute based on the malicious configuration parameters. Since systems are increasingly interrelated mashing up resources from local and remote sources the possibility of this attack occurring is high.
CAPEC-77: Manipulating User-Controlled Variables
This attack targets user controlled variables (DEBUG=1, PHP Globals, and So Forth). An adversary can override variables leveraging user-supplied, untrusted query variables directly used on the application server without any data sanitization. In extreme cases, the adversary can change variables controlling the business logic of the application. For instance, in languages like PHP, a number of poorly set default configurations may allow the user to override variables.