ghsa-6pqf-c99p-758v
Vulnerability from github
Impact
The HTML sanitizer that is included in XWiki since version 14.6RC1 allowed form and input HTML tags. In the context of XWiki, this allows an attacker without script right to either create forms that can be used for phishing attacks or also in the context of a sheet, the attacker could add an input like {{html}}<input type="hidden" name="content" value="{{groovy}}println("Hello from Groovy!")" />{{/html}} that would allow remote code execution when it is submitted by an admin (the sheet is rendered as part of the edit form). The attacker would need to ensure that the edit form looks plausible, though, which can be non-trivial as without script right the attacker cannot display the regular content of the document.
Patches
This has been patched in XWiki 14.10.6 and 15.2RC1 by removing the central form-related tags from the list of allowed tags.
Workarounds
An admin can manually disallow the tags by adding form, input, select, textarea, button to the configuration option xml.htmlElementSanitizer.forbidTags in the xwiki.properties configuration file.
References
- https://jira.xwiki.org/browse/XCOMMONS-2634
- https://github.com/xwiki/xwiki-commons/commit/99484d48e899a68a1b6e33d457825b776c6fe8c3
{
"affected": [
{
"package": {
"ecosystem": "Maven",
"name": "org.xwiki.commons:xwiki-commons-xml"
},
"ranges": [
{
"events": [
{
"introduced": "14.6-rc-1"
},
{
"fixed": "14.10.6"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Maven",
"name": "org.xwiki.commons:xwiki-commons-xml"
},
"ranges": [
{
"events": [
{
"introduced": "15.0-rc-1"
},
{
"fixed": "15.2-rc-1"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2023-36471"
],
"database_specific": {
"cwe_ids": [
"CWE-74",
"CWE-79"
],
"github_reviewed": true,
"github_reviewed_at": "2023-06-30T20:41:50Z",
"nvd_published_at": "2023-06-29T20:15:10Z",
"severity": "CRITICAL"
},
"details": "### Impact\n\nThe HTML sanitizer that is included in XWiki since version 14.6RC1 allowed form and input HTML tags. In the context of XWiki, this allows an attacker without script right to either create forms that can be used for phishing attacks or also in the context of a sheet, the attacker could add an input like `{{html}}\u003cinput type=\"hidden\" name=\"content\" value=\"{{groovy}}println(\u0026quot;Hello from Groovy!\u0026quot;)\" /\u003e{{/html}}` that would allow remote code execution when it is submitted by an admin (the sheet is rendered as part of the edit form). The attacker would need to ensure that the edit form looks plausible, though, which can be non-trivial as without script right the attacker cannot display the regular content of the document.\n\n### Patches\nThis has been patched in XWiki 14.10.6 and 15.2RC1 by removing the central form-related tags from the list of allowed tags.\n\n### Workarounds\nAn admin can manually disallow the tags by adding `form, input, select, textarea, button` to the configuration option `xml.htmlElementSanitizer.forbidTags` in the `xwiki.properties` configuration file.\n\n### References\n* https://jira.xwiki.org/browse/XCOMMONS-2634\n* https://github.com/xwiki/xwiki-commons/commit/99484d48e899a68a1b6e33d457825b776c6fe8c3\n",
"id": "GHSA-6pqf-c99p-758v",
"modified": "2023-06-30T20:41:50Z",
"published": "2023-06-30T20:41:50Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/xwiki/xwiki-commons/security/advisories/GHSA-6pqf-c99p-758v"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-36471"
},
{
"type": "WEB",
"url": "https://github.com/xwiki/xwiki-commons/commit/99484d48e899a68a1b6e33d457825b776c6fe8c3"
},
{
"type": "PACKAGE",
"url": "https://github.com/xwiki/xwiki-commons"
},
{
"type": "WEB",
"url": "https://jira.xwiki.org/browse/XCOMMONS-2634"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H",
"type": "CVSS_V3"
}
],
"summary": "org.xwiki.commons:xwiki-commons-xml\u0027s HTML sanitizer allows form elements in restricted"
}
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.