XWiki vulnerable to click-jacking through CSS injection in comments

CVE-2026-26000 → View on GitHub ↗ View on CVE.org ↗ View on NVD ↗

Description

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.

Basic information

Type
reviewed
Severity
medium
Advisory on GitHub
Open advisory ↗
Repository advisory
Open repository advisory ↗
Source code
Browse source ↗
Published (advisory)
2026-02-12 15:54:19 UTC
Updated
2026-02-12 22:08:13 UTC
GitHub reviewed
2026-02-12 15:54:19 UTC
NVD published
2026-02-12

EPSS Score

Score Percentile
0.03% 9.17%

CVSS Scores

Base score Version Severity Vector
5.3 4.0 —
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 Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network.
Attack complexity (AC:L)
Exploitation conditions are straightforward and stable.
Attack requirements (AT:N)
No additional preconditions are required beyond normal reachability.
Privileges required (PR:N)
No privileges are required.
User interaction (UI:P)
A user has to participate (for example click/open/approve).
Vulnerable system confidentiality impact (VC:L)
Limited confidentiality impact on the vulnerable system.
Vulnerable system integrity impact (VI:L)
Limited integrity impact on the vulnerable system.
Vulnerable system availability impact (VA:L)
Limited availability impact on the vulnerable system.
Subsequent system confidentiality impact (SC:N)
No confidentiality impact on subsequent systems.
Subsequent system integrity impact (SI:N)
No integrity impact on subsequent systems.
Subsequent system availability impact (SA:N)
No availability impact on subsequent systems.

Identifiers

Type Value
GHSA GHSA-74rh-c5rh-88vg ↗
CVE CVE-2026-26000 ↗

CWEs

CWE id Name
CWE-1021 Improper Restriction of Rendered UI Layers or Frames

Credits

  • keechy1231 (reporter)

Affected packages (3)

Vulnerable version ranges and first patched releases as published by GitHub.

Ecosystem Package Vulnerable range First patched Vulnerable functions
maven org.xwiki.platform:xwiki-platform-web >= 17.5.0, < 17.9.0 17.9.0 —
maven org.xwiki.platform:xwiki-platform-web >= 17.0.0-rc-1, < 17.4.6 17.4.6 —
maven org.xwiki.platform:xwiki-platform-web < 16.10.13 16.10.13 —

References

cvelogic Threat Intelligence