ghsa-h8cm-3v5f-rgp6
Vulnerability from github
Impact
Any registered user can exploit a stored XSS through their user profile by setting the payload as the value of the time zone user preference. Even though the time zone is selected from a drop down (no free text value) it can still be set from JavaScript (using the browser developer tools) or by calling the save URL on the user profile with the right query string. Once the time zone is set it is displayed without escaping which means the payload gets executed for any user that visits the malicious user profile, allowing the attacker to steal information and even gain more access rights (escalation to programming rights).
The problem is present since version 4.1M2 when the time zone user preference was introduced.
Patches
The issue has been fixed in XWiki 14.10.5 and 15.1RC1 by https://github.com/xwiki/xwiki-platform/commit/d11ca5d781f8a42a85bc98eb82306c1431e764d4 . The main fix is in the displayer_timezone.vm precisely at this line:
$!escapetool.xml($value)
By escaping the displayed time zone value we make sure the attacker's payload is not executed.
Workarounds
If you want to fix this problem on older versions of XWiki that have not been patched then you need to edit displayer_timezone.vm and escape the displayed time zone value here:
- $!value
+ $!escapetool.xml($value)
References
- JIRA issue https://jira.xwiki.org/browse/XWIKI-20276
- Fix https://github.com/xwiki/xwiki-platform/commit/d11ca5d781f8a42a85bc98eb82306c1431e764d4
For more information
If you have any questions or comments about this advisory: * Open an issue in Jira XWiki.org * Email us at Security Mailing List
Attribution
This vulnerability has been found and reported by @michitux .
{
"affected": [
{
"package": {
"ecosystem": "Maven",
"name": "org.xwiki.platform:xwiki-platform-web-templates"
},
"ranges": [
{
"events": [
{
"introduced": "4.1-milestone-2"
},
{
"fixed": "14.10.5"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2023-40176"
],
"database_specific": {
"cwe_ids": [
"CWE-79"
],
"github_reviewed": true,
"github_reviewed_at": "2023-08-21T19:59:12Z",
"nvd_published_at": "2023-08-23T20:15:08Z",
"severity": "MODERATE"
},
"details": "### Impact\n\nAny registered user can exploit a stored XSS through their user profile by setting the payload as the value of the time zone user preference. Even though the time zone is selected from a drop down (no free text value) it can still be set from JavaScript (using the browser developer tools) or by calling the save URL on the user profile with the right query string. Once the time zone is set it is displayed without escaping which means the payload gets executed for any user that visits the malicious user profile, allowing the attacker to steal information and even gain more access rights (escalation to programming rights).\n\nThe problem is present [since version 4.1M2](https://jira.xwiki.org/browse/XWIKI-7847) when the time zone user preference was introduced.\n\n### Patches\n\nThe issue has been fixed in XWiki 14.10.5 and 15.1RC1 by https://github.com/xwiki/xwiki-platform/commit/d11ca5d781f8a42a85bc98eb82306c1431e764d4 . The main fix is in the [``displayer_timezone.vm``](https://github.com/xwiki/xwiki-platform/commit/d11ca5d781f8a42a85bc98eb82306c1431e764d4#diff-57ffb6e10fa8768e59948f2becf755699570d97b78bb12a9623e0de49e6c5c7d) precisely at this [line](https://github.com/xwiki/xwiki-platform/commit/d11ca5d781f8a42a85bc98eb82306c1431e764d4#diff-57ffb6e10fa8768e59948f2becf755699570d97b78bb12a9623e0de49e6c5c7dR40):\n\n $!escapetool.xml($value)\n\nBy escaping the displayed time zone value we make sure the attacker\u0027s payload is not executed.\n\n### Workarounds\n\nIf you want to fix this problem on older versions of XWiki that have not been patched then you need to edit ``displayer_timezone.vm`` and escape the displayed time zone value [here](https://github.com/xwiki/xwiki-platform/blob/xwiki-platform-14.10.4/xwiki-platform-core/xwiki-platform-web/xwiki-platform-web-templates/src/main/resources/templates/displayer_timezone.vm#L32):\n\n```\n- $!value\n+ $!escapetool.xml($value)\n```\n\n### References\n\n* JIRA issue https://jira.xwiki.org/browse/XWIKI-20276\n* Fix https://github.com/xwiki/xwiki-platform/commit/d11ca5d781f8a42a85bc98eb82306c1431e764d4\n\n### For more information\n\nIf you have any questions or comments about this advisory:\n* Open an issue in [Jira XWiki.org](https://jira.xwiki.org/)\n* Email us at [Security Mailing List](mailto:security@xwiki.org)\n\n### Attribution\n\nThis vulnerability has been found and reported by @michitux .",
"id": "GHSA-h8cm-3v5f-rgp6",
"modified": "2023-08-29T22:44:58Z",
"published": "2023-08-21T19:59:12Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-h8cm-3v5f-rgp6"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-40176"
},
{
"type": "WEB",
"url": "https://github.com/xwiki/xwiki-platform/commit/d11ca5d781f8a42a85bc98eb82306c1431e764d4"
},
{
"type": "PACKAGE",
"url": "https://github.com/xwiki/xwiki-platform"
},
{
"type": "WEB",
"url": "https://jira.xwiki.org/browse/XWIKI-7847"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N",
"type": "CVSS_V3"
}
],
"summary": "XWiki Platform Stored Cross-site Scripting in the user profile via the timezone displayer"
}
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.