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GHSA-74RH-C5RH-88VG

Vulnerability from github – Published: 2026-02-12 15:54 – Updated: 2026-02-12 22:08
VLAI
Summary
XWiki vulnerable to click-jacking through CSS injection in comments
Details

Impact

It's possible using comments to inject CSS that would transform the full wiki in a link area leading to a malicious page. All versions of XWiki are impacted by this kind of attack.

Patches

The problem has been patched not by preventing injecting CSS in comments, which is currently a feature of XWiki, but by requiring confirmation from users when driving them to untrusted domains after clicking on a link, thus preventing any click-jacking attack. This security measure has been put in place in XWiki 17.9.0, 17.4.6, 16.10.13.

Workarounds

There's no out-of-the-box workaround, but it should be possible to partly reuse the javascript code provided for the security measure in a JSX object inside the wiki, to request the same kind of confirmation.

References

  • JIRA ticket: https://jira.xwiki.org/browse/XWIKI-23433
  • Documentation of the new security measure: https://www.xwiki.org/xwiki/bin/view/ReleaseNotes/Data/XWiki/17.9.0RC1/Entry006/
  • Commit for the security fix: https://github.com/xwiki/xwiki-platform/commit/29cb81f3a5387cf822d7e7534bdd63903275f86b

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

Thanks Tomas Keech (Sentrium Security Ltd) for reporting this vulnerability.

Severity
5.3 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
Show details on source website
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{
  "affected": [
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.xwiki.platform:xwiki-platform-web"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "17.5.0"
            },
            {
              "fixed": "17.9.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.xwiki.platform:xwiki-platform-web"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "17.0.0-rc-1"
            },
            {
              "fixed": "17.4.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.xwiki.platform:xwiki-platform-web"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "16.10.13"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-26000"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-1021"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-02-12T15:54:19Z",
    "nvd_published_at": "2026-02-12T21:16:02Z",
    "severity": "MODERATE"
  },
  "details": "### Impact\n\nIt\u0027s possible using comments to inject CSS that would transform the full wiki in a link area leading to a malicious page. All versions of XWiki are impacted by this kind of attack. \n\n### Patches\n\nThe problem has been patched not by preventing injecting CSS in comments, which is currently a feature of XWiki, but by requiring confirmation from users when driving them to untrusted domains after clicking on a link, thus preventing any click-jacking attack. \nThis security measure has been put in place in XWiki 17.9.0, 17.4.6, 16.10.13.\n\n### Workarounds\n\nThere\u0027s no out-of-the-box workaround, but it should be possible to partly reuse [the javascript code provided for the security measure](https://github.com/xwiki/xwiki-platform/blob/xwiki-platform-17.9.0/xwiki-platform-core/xwiki-platform-web/xwiki-platform-web-war/src/main/webapp/resources/uicomponents/link/link-protection.js) in a JSX object inside the wiki, to request the same kind of confirmation. \n\n### References\n  * JIRA ticket: https://jira.xwiki.org/browse/XWIKI-23433\n  * Documentation of the new security measure: https://www.xwiki.org/xwiki/bin/view/ReleaseNotes/Data/XWiki/17.9.0RC1/Entry006/\n  * Commit for the security fix: https://github.com/xwiki/xwiki-platform/commit/29cb81f3a5387cf822d7e7534bdd63903275f86b\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\nThanks Tomas Keech (Sentrium Security Ltd) for reporting this vulnerability.",
  "id": "GHSA-74rh-c5rh-88vg",
  "modified": "2026-02-12T22:08:10Z",
  "published": "2026-02-12T15:54:19Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-74rh-c5rh-88vg"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-26000"
    },
    {
      "type": "WEB",
      "url": "https://github.com/xwiki/xwiki-platform/pull/4645"
    },
    {
      "type": "WEB",
      "url": "https://github.com/xwiki/xwiki-platform/commit/29cb81f3a5387cf822d7e7534bdd63903275f86b"
    },
    {
      "type": "WEB",
      "url": "https://github.com/xwiki/xwiki-platform/commit/7b5a4f8c34d9b1da3d966e17f7dbccabac448e75"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/xwiki/xwiki-platform"
    },
    {
      "type": "WEB",
      "url": "https://github.com/xwiki/xwiki-platform/releases/tag/xwiki-platform-17.4.6"
    },
    {
      "type": "WEB",
      "url": "https://jira.xwiki.org/browse/XWIKI-23433"
    },
    {
      "type": "WEB",
      "url": "https://www.xwiki.org/xwiki/bin/view/ReleaseNotes/Data/XWiki/17.9.0RC1/Entry006"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "XWiki vulnerable to click-jacking through CSS injection in comments"
}



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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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