CVE-2026-53966
Fix: xwiki/xwiki-platform@448b0f0CVE-2026-53966 is a security vulnerability in org.xwiki.platform:xwiki-platform-livedata-livetable. O3 Security confirms whether CVE-2026-53966 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
XWiki Platform Live Data Live Table Connector has privilege escalation from edit to script right through Live Data editing
Real-World Exposure
org.xwiki.platform:xwiki-platform-livedata-livetable☕org.xwiki.platform:xwiki-platform-livedata-livetable☕org.xwiki.platform:xwiki-platform-livedata-livetable☕org.xwiki.platform:xwiki-platform-livedata-livetableReal-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 edit a page in XWiki can use Live Data's edit REST API in XWiki to change the rights on that page. This allows the user to obtain script right on the page. Script right allows the user to execute potentially dangerous Velocity scripts and send unfiltered HTML and JavaScript to the client. If there are other security checks, e.g., in extensions, implemented as listeners to UserUpdatingDocumentEvent and similar User… events, these checks can be circumvented, too.
Patches
This vulnerability has been patched by properly calling all checks in Live Data in XWiki 16.10.17, 17.4.10, 17.10.4 and 18.1.0.
Workarounds
We're not aware of any workarounds apart from upgrading.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| ☕Maven | org.xwiki.platform:xwiki-platform-livedata-livetable | ≥ 13.4-rc-1&&< 16.10.17 | 16.10.17 |
| ☕Maven | org.xwiki.platform:xwiki-platform-livedata-livetable | ≥ 17.0.0-rc-1&&< 17.4.10 | 17.4.10 |
| ☕Maven | org.xwiki.platform:xwiki-platform-livedata-livetable | ≥ 17.5.0-rc-1&&< 17.10.4 | 17.10.4 |
| ☕Maven | org.xwiki.platform:xwiki-platform-livedata-livetable | ≥ 18.0.0-rc-1&&< 18.1.0-rc-1 | 18.1.0-rc-1 |
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-livedata-livetable. 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-livedata-livetable to 16.10.17 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-53966 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 CVE-2026-53966 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 CVE-2026-53966. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is CVE-2026-53966 in your dependencies?
O3 detects CVE-2026-53966 across Maven dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.