CVE-2026-26000: Xwiki platform web XWiki Vulnerable To Click-jacking Through Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-74rh-c5rh-88vg",
  "modified" : "2026-02-12T22:08:10Z",
  "published" : "2026-02-12T15:54:19Z",
  "aliases" : [ "CVE-2026-26000" ],
  "summary" : "XWiki vulnerable to click-jacking through CSS injection in comments",
  "details" : "### Impact\n\nIt'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. \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's 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.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "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"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.xwiki.platform:xwiki-platform-web"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "17.5.0"
      }, {
        "fixed" : "17.9.0"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.xwiki.platform:xwiki-platform-web"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "17.0.0-rc-1"
      }, {
        "fixed" : "17.4.6"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.xwiki.platform:xwiki-platform-web"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "16.10.13"
      } ]
    } ]
  } ],
  "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"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-1021" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-02-12T15:54:19Z",
    "nvd_published_at" : "2026-02-12T21:16:02Z"
  }
}