How severe is CVE-2026-53966?

No CVSS score has been assigned to CVE-2026-53966 yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by CVE-2026-53966?

CVE-2026-53966 affects the following packages: org.xwiki.platform:xwiki-platform-livedata-livetable (Maven), org.xwiki.platform:xwiki-platform-livedata-livetable (Maven), org.xwiki.platform:xwiki-platform-livedata-livetable (Maven), org.xwiki.platform:xwiki-platform-livedata-livetable (Maven). Ecosystems affected: Maven.

How do I fix CVE-2026-53966?

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.

How do I detect CVE-2026-53966 in my Maven dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.xwiki.platform:xwiki-platform-livedata-livetable, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2026-53966 if there is no patch (or I can't update yet)?

Put an independent control in front of the weakness: restrict the affected endpoint or interface to trusted networks, require an additional authentication factor or proxy-level check, and invalidate existing sessions and credentials in case the flaw has already been used.

Is CVE-2026-53966 actively exploited in the wild?

No public exploit code has been indexed for CVE-2026-53966 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2026-53966?

CVE-2026-53966 has an EPSS (Exploit Prediction Scoring System) score of 0.8%, placing it in the 54th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2026-53966?

CVE-2026-53966 is classified as CWE-862 (CWE-862). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was CVE-2026-53966 published, and has it been updated?

CVE-2026-53966 was published on September 15, 2026 and was last updated on October 2, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

☕ Maven

Not in CISA KEV

CVE-2026-53966 — xwiki-platform-livedata-l…

Fix: xwiki/xwiki-platform@1ddb954

CVE-2026-53966 is a CWE-862 vulnerability in org.xwiki.platform:xwiki-platform-livedata-livetable. A fix is available for org.xwiki.platform:xwiki-platform-livedata-livetable — see the affected versions and patch details below.

XWiki Platform: Privilege escalation from edit to script right through Live Data editing

Also known asGHSA-45ph-gxxr-gwgw

Published

Sep 15, 2026

Updated

Oct 2, 2026

Affected

4 pkgs

Patched

4 / 4

Exploits

None indexed

Exploitation data as of Oct 2, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2026-53966.

EPSS Exploitation Probability

via FIRST.org ↗

0.8%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs54th percentile — riskier than 54% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

Real-World Exposure

4 pkgs affected

☕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-livetable

Real-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

4 total 4 fixed

Ecosystem	Package	Vulnerable range	Fix
☕Maven	`org.xwiki.platform:xwiki-platform-livedata-livetable`	≥ 13.4-rc-1&&< 16.10.17	16.10.17`org.xwiki.platform:xwiki-platform-livedata-livetable:16.10.17`
☕Maven	`org.xwiki.platform:xwiki-platform-livedata-livetable`	≥ 17.0.0-rc-1&&< 17.4.10	17.4.10`org.xwiki.platform:xwiki-platform-livedata-livetable:17.4.10`
☕Maven	`org.xwiki.platform:xwiki-platform-livedata-livetable`	≥ 17.5.0-rc-1&&< 17.10.4	17.10.4`org.xwiki.platform:xwiki-platform-livedata-livetable: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`org.xwiki.platform:xwiki-platform-livedata-livetable:18.1.0-rc-1`

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.xwiki.platform:xwiki-platform-livedata-livetable, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
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
Put an independent control in front of the weakness: restrict the affected endpoint or interface to trusted networks, require an additional authentication factor or proxy-level check, and invalidate existing sessions and credentials in case the flaw has already been used.

Frequently Asked Questions

### 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

O3 Security · Impact-Aware SCA

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