XWiki Platform privilege escalation (PR)/RCE from account through Invitation subject/messageGHSA-7954-6m9q-gpvf
CRITICALFix: xwiki/xwiki-platform@ff1d8a1GHSA-7954-6m9q-gpvf is a critical-severity (CVSS 9.9) Code Injection vulnerability in org.xwiki.platform:xwiki-platform-invitation-ui. 2 public exploit or proof-of-concept references are indexed, so weaponization risk is real. A fix is available for org.xwiki.platform:xwiki-platform-invitation-ui — see the affected versions and patch details below.
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.
- A successful exploit gives an attacker total control of the affected component, not partial access.
Exploitation and automatability from CISA’s SSVC triage for GHSA-7954-6m9q-gpvf.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
Where this sits among everything scored
Real-World Exposure
org.xwiki.platform:xwiki-platform-invitation-ui☕org.xwiki.platform:xwiki-platform-invitation-ui☕org.xwiki.platform:xwiki-platform-invitation-uiReal-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
Any user who can view Invitation.WebHome can execute arbitrary script macros including Groovy and Python macros that allow remote code execution including unrestricted read and write access to all wiki contents. This can be reproduced with the following steps:
- Open the invitation application (Invitation.WebHome).
- Set the subject to
{{cache}}{{groovy}}new File("/tmp/exploit.txt").withWriter { out -> out.println("Attacked from invitation!"); }{{/groovy}}{{/cache}} - Click "Preview"
Patches
The vulnerability has been patched on XWiki 14.4.8, 15.2-rc-1, and 14.10.6.
Workarounds
The vulnerability can be patched manually by applying the patch on Invitation.InvitationCommon and Invitation.InvitationConfig.
References
- https://jira.xwiki.org/browse/XWIKI-20421
- https://github.com/xwiki/xwiki-platform/commit/ff1d8a1790c6ee534c6a4478360a06efeb2d3591
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.platform:xwiki-platform-invitation-ui | ≥ 2.5-m-1&&< 14.4.8 | 14.4.8org.xwiki.platform:xwiki-platform-invitation-ui:14.4.8 |
| ☕Maven | org.xwiki.platform:xwiki-platform-invitation-ui | ≥ 14.5&&< 14.10.6 | 14.10.6org.xwiki.platform:xwiki-platform-invitation-ui:14.10.6 |
| ☕Maven | org.xwiki.platform:xwiki-platform-invitation-ui | ≥ 15.0-rc-1&&< 15.2-rc-1 | 15.2-rc-1org.xwiki.platform:xwiki-platform-invitation-ui:15.2-rc-1 |
Affected Products
xwikixwikiResearch 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-invitation-ui, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update org.xwiki.platform:xwiki-platform-invitation-ui to 14.4.8 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-7954-6m9q-gpvf is resolved across your whole dependency graph.
Workarounds
Stop passing untrusted input into the interpreter or shell: call the affected binary with an argument array rather than a composed command string, reject anything outside a strict allowlist of expected values, and run the component under an account that cannot reach beyond the work it legitimately does.
Frequently Asked Questions
Is GHSA-7954-6m9q-gpvf in your dependencies?
Find it across Maven, including transitive dependencies.