GHSA-r5cr-xm48-97xp
MEDIUMXWiki missing authorization when accessing the wiki level attachments list and metadata via REST API
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.platform:xwiki-platform-rest-server☕org.xwiki.platform:xwiki-platform-rest-server☕org.xwiki.platform:xwiki-platform-rest-server☕org.xwiki.platform:xwiki-platform-rest-serverReal-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
Anyone can access the metadata of any attachment in the wiki using the wiki attachment REST endpoint. It's not filtering the result depending on current user rights, a not authenticated user could exploit this even in a totally private wiki.
To reproduce:
- remove view from guest on the whole wiki
- logout
- access http://127.0.0.1:8080/xwiki/rest/wikis/xwiki/spaces/Sandbox/pages/WebHome/attachments
You get a list of attachments, while the expected result should be an empty list.
Patches
This vulnerability has been fixed in XWiki 14.10.22, 15.10.12, 16.7.0-rc-1 and 16.4.3.
Workarounds
We're not aware of any workaround except upgrading.
References
- https://jira.xwiki.org/browse/XWIKI-22424
- https://jira.xwiki.org/browse/XWIKI-22427
- https://github.com/xwiki/xwiki-platform/commit/a43e933ddeda17dad1772396e1757998260e9342#diff-0
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
Issue reported by Lukas Monert.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| ☕Maven | org.xwiki.platform:xwiki-platform-rest-server | ≥ 1.8.1&&< 14.10.22 | 14.10.22 |
| ☕Maven | org.xwiki.platform:xwiki-platform-rest-server | ≥ 15.0-rc-1&&< 15.10.12 | 15.10.12 |
| ☕Maven | org.xwiki.platform:xwiki-platform-rest-server | ≥ 16.0.0-rc-1&&< 16.4.3 | 16.4.3 |
| ☕Maven | org.xwiki.platform:xwiki-platform-rest-server | ≥ 16.5.0-rc-1&&< 16.7.0 | 16.7.0 |
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-rest-server. 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-rest-server to 14.10.22 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-r5cr-xm48-97xp 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-r5cr-xm48-97xp 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-r5cr-xm48-97xp. 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-r5cr-xm48-97xp in your dependencies?
O3 detects GHSA-r5cr-xm48-97xp across Maven dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.