GHSA-r5cr-xm48-97xp is a medium-severity (CVSS 5.3) CWE-862 vulnerability in org.xwiki.platform:xwiki-platform-rest-server. A fix is available for org.xwiki.platform:xwiki-platform-rest-server — see the affected versions and patch details below.
XWiki missing authorization when accessing the wiki level attachments list and metadata via REST API
Exploitation Status
Proof-of-concept exploit code exists
- CISA’s SSVC triage found public proof-of-concept exploit code for this CVE, though no confirmed active exploitation.
- CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.
Exploitation and automatability from CISA’s SSVC triage for GHSA-r5cr-xm48-97xp.
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-r5cr-xm48-97xp 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 379,145 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-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 | 14.10.22org.xwiki.platform:xwiki-platform-rest-server:14.10.22 |
| ☕Maven | org.xwiki.platform:xwiki-platform-rest-server | ≥ 15.0-rc-1&&< 15.10.12 | 15.10.12org.xwiki.platform:xwiki-platform-rest-server:15.10.12 |
| ☕Maven | org.xwiki.platform:xwiki-platform-rest-server | ≥ 16.0.0-rc-1&&< 16.4.3 | 16.4.3org.xwiki.platform:xwiki-platform-rest-server:16.4.3 |
| ☕Maven | org.xwiki.platform:xwiki-platform-rest-server | ≥ 16.5.0-rc-1&&< 16.7.0 | 16.7.0org.xwiki.platform:xwiki-platform-rest-server: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, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
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 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like GHSA-r5cr-xm48-97xp can be triaged on real exposure rather than presence alone.
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.
How to detect GHSA-r5cr-xm48-97xp
A community-maintained Nuclei template exists for this CVE. You can scan for it directly:
nuclei -id ghsa-r5cr-xm48-97xp -u https://target- Template
- XWiki REST API - Attachments Disclosure
- Severity
- high
- Impact
- Unauthenticated users can access attachment lists and metadata through the REST API attachments endpoint, potentially exposing sensitive information.
- Remediation
- Upgrade to the latest XWiki version that implements proper authorization checks for the attachments REST API endpoint.
Template by ProjectDiscovery nuclei-templates (ritikchaddha), MIT licensed. View the full template. Scan only systems you are authorised to test.
Frequently Asked Questions
Is GHSA-r5cr-xm48-97xp in your dependencies?
O3 Security finds GHSA-r5cr-xm48-97xp across Maven dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.