GHSA-gx6h-936c-vrrr is a high-severity (CVSS 7.4) Cross-site Scripting (XSS) vulnerability in org.xwiki.platform:xwiki-platform-web-templates. O3 Security confirms whether GHSA-gx6h-936c-vrrr is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
Cross site scripting in registration template in xwiki-platform
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.
How urgent is this, really
GHSA-gx6h-936c-vrrr plotted by exploitation likelihood (EPSS) against impact (CVSS). The shaded corner — EPSS 50%+ and CVSS 7.0+ — is where this CVE doesn't sit, though severity or exploitability alone can still warrant action.
Where this sits among everything scored
Of 0 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Real counts from FIRST.org, not a sample — log-scaled since the landscape is heavily right-skewed.
Real-World Exposure
org.xwiki.platform:xwiki-platform-web-templates☕org.xwiki.platform:xwiki-platform-web-templates☕org.xwiki.platform:xwiki-platform-web-templatesReal-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
We found a possible XSS vector in the registerinline.vm template related to the xredirect hidden field.
This template is only used in the following conditions:
- the wiki must be open to registration for anyone
- the wiki must be closed to view for Guest users (more specifically the XWiki.Registration page must be forbidden in View for guest user)
A way to obtain the second condition is when administrators checked the "Prevent unregistered users from viewing pages, regardless of the page rights" box in the administration rights.
Patches
The issue is patched in versions 12.10.11, 14.0-rc-1, 13.4.7, 13.10.3.
Workarounds
There are two main ways for protecting against this vulnerability, the easiest and the best one is by applying a patch in the registerinline.vm template, the patch consists in checking the value of the xredirect field to ensure it matches the following:
<input type="hidden" name="xredirect" value="$escapetool.xml($!request.xredirect)" />
If for some reason it's not possible to patch this file, another workaround is to ensure "Prevent unregistered users from viewing pages, regardless of the page rights" is not checked in the rights and apply a better right scheme using groups and rights on spaces.
References
https://jira.xwiki.org/browse/XWIKI-19291
For more information
If you have any questions or comments about this advisory:
- Open an issue in Jira XWiki
- Email us at security mailing list
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| ☕Maven | org.xwiki.platform:xwiki-platform-web-templates | ≥ 2.6.1&&< 12.10.11 | 12.10.11 |
| ☕Maven | org.xwiki.platform:xwiki-platform-web-templates | ≥ 13.0.0&&< 13.4.7 | 13.4.7 |
| ☕Maven | org.xwiki.platform:xwiki-platform-web-templates | ≥ 13.10.0&&< 13.10.3 | 13.10.3 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.xwiki.platform:xwiki-platform-web-templates. 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.platform:xwiki-platform-web-templates to 12.10.11 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-gx6h-936c-vrrr 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-gx6h-936c-vrrr 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-gx6h-936c-vrrr. 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-gx6h-936c-vrrr in your dependencies?
O3 detects GHSA-gx6h-936c-vrrr across Maven dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.