GHSA-6gf5-c898-7rxp
CRITICALImproper Neutralization of Script in Attributes in XWiki (X)HTML renderers
EPSS Exploitation Probability
EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.
Blast Radius
org.xwiki.rendering:xwiki-rendering-syntax-xhtml☕org.xwiki.platform:xwiki-core-rendering-api☕org.xwiki.rendering:xwiki-rendering-syntax-html☕org.xwiki.rendering:xwiki-rendering-syntax-html5☕org.xwiki.rendering:xwiki-rendering-syntax-annotatedxhtml☕org.xwiki.rendering:xwiki-rendering-syntax-annotatedhtml5☕org.xwiki.platform:xwiki-platform-annotation-coreReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.
Description
Impact
HTML rendering didn't check for dangerous attributes/attribute values. This allowed cross-site scripting (XSS) attacks via attributes and link URLs, e.g., supported in XWiki syntax.
Patches
This has been patched in XWiki 14.6 RC1.
Workarounds
There are no known workarounds apart from upgrading to a fixed version.
References
- https://github.com/xwiki/xwiki-rendering/commit/c40e2f5f9482ec6c3e71dbf1fff5ba8a5e44cdc1
- https://jira.xwiki.org/browse/XRENDERING-663
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
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| ☕Maven | org.xwiki.rendering:xwiki-rendering-syntax-xhtml | all versions | 14.6-rc-1 |
| ☕Maven | org.xwiki.platform:xwiki-core-rendering-api | all versions | No fix |
| ☕Maven | org.xwiki.rendering:xwiki-rendering-syntax-html | all versions | 14.6-rc-1 |
| ☕Maven | org.xwiki.rendering:xwiki-rendering-syntax-html5 | all versions | 14.6-rc-1 |
| ☕Maven | org.xwiki.rendering:xwiki-rendering-syntax-annotatedxhtml | all versions | 14.6-rc-1 |
| ☕Maven | org.xwiki.rendering:xwiki-rendering-syntax-annotatedhtml5 | all versions | 14.6-rc-1 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.xwiki.rendering:xwiki-rendering-syntax-xhtml. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Fix
Update org.xwiki.rendering:xwiki-rendering-syntax-xhtml to 14.6-rc-1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-6gf5-c898-7rxp is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether GHSA-6gf5-c898-7rxp is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to GHSA-6gf5-c898-7rxp. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is GHSA-6gf5-c898-7rxp in your dependencies?
O3 detects GHSA-6gf5-c898-7rxp across Maven dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.