GHSA-wf3x-jccf-5g5g
MEDIUMGHSA-wf3x-jccf-5g5g is a medium-severity (CVSS 6.4) CWE-96 vulnerability in org.xwiki.platform:xwiki-platform-web-war. 3 public exploit references exist, so weaponization risk is real. O3 Security confirms whether GHSA-wf3x-jccf-5g5g is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
XWiki Platform vulnerable to Cross-site Scripting through attachment filename in uploader
Blast Radius
org.xwiki.platform:xwiki-platform-web-war☕org.xwiki.platform:xwiki-platform-web-war☕org.xwiki.platform:xwiki-platform-web-war☕org.xwiki.platform:xwiki-platform-web-warReal-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
When uploading an attachment with a malicious filename, malicious JavaScript code could be executed. This requires a social engineering attack to get the victim into uploading a file with a malicious name. The malicious code is solely executed during the upload and affects only the user uploading the attachment. While this allows performing actions in the name of that user, it seems unlikely that a user wouldn't notice the malicious filename while uploading the attachment.
In order to reproduce, as any user, create a file named "><img src=1 onerror=alert(1)>.jpg. Then go to any page where you have edit rights and upload the file in the attachments tab. If alerts appear and display "1", then the instance is vulnerable.
Patches
This has been patched in XWiki 14.10.21, 15.5.5, 15.10.6 and 16.0.0.
Workarounds
We're not aware of any workaround except upgrading.
References
- https://jira.xwiki.org/browse/XWIKI-19611
- https://jira.xwiki.org/browse/XWIKI-21769
- https://jira.xwiki.org/browse/XWIKI-19602
- https://github.com/xwiki/xwiki-platform/commit/910a5018a50039e8b24556573dfe342f143ef949
Attribution
This vulnerability has been independently reported by Aleksey Solovev (Positive Technologies) and Georgios Roumeliotis for TwelveSec.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| ☕Maven | org.xwiki.platform:xwiki-platform-web-war | ≥ 4.2-milestone-3&&< 14.10.21 | 14.10.21 |
| ☕Maven | org.xwiki.platform:xwiki-platform-web-war | ≥ 15.0-rc-1&&< 15.5.5 | 15.5.5 |
| ☕Maven | org.xwiki.platform:xwiki-platform-web-war | ≥ 15.6-rc-1&&< 15.10.6 | 15.10.6 |
| ☕Maven | org.xwiki.platform:xwiki-platform-web-war | ≥ 16.0.0-rc-1&&< 16.0.0 | 16.0.0 |
Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.
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-war. 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-war to 14.10.21 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-wf3x-jccf-5g5g 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-wf3x-jccf-5g5g 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-wf3x-jccf-5g5g. 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-wf3x-jccf-5g5g in your dependencies?
O3 detects GHSA-wf3x-jccf-5g5g across Maven dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.