CVE-2026-53966
highpriority · track · 0OT risk · elevatedEPSS 0.008 · 55 %ileDEUSEPSS · scored 2026-10-27
XWiki Platform is a generic wiki platform. From 13.4-rc-1 until 16.10.17, 17.4.10, 17.10.4, and 18.1.0-rc-1, the Live Data edit REST API allows a user who can edit a page to change that page's rights without executing the normal document-saving authorization checks. The user can grant script right and then execute potentially dangerous Velocity scripts or send unfiltered HTML and JavaScript to clients. The same missing checks can circumvent extension security controls implemented as listeners for UserUpdatingDocumentEvent and related user document events. This issue is fixed in versions 16.10.17, 17.4.10, 17.10.4, and 18.1.0-rc-1.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 4.9–7.1
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (12)
Products and version ranges known to be affected.
- Maven org.xwiki.platform:xwiki-platform-livedata-livetable13.4-rc-1 → 16.10.17osvUSpkg:maven/org.xwiki.platform/xwiki-platform-livedata-livetable
- Maven org.xwiki.platform:xwiki-platform-livedata-livetable17.0.0-rc-1 → 17.4.10osvUSpkg:maven/org.xwiki.platform/xwiki-platform-livedata-livetable
- Maven org.xwiki.platform:xwiki-platform-livedata-livetable17.5.0-rc-1 → 17.10.4osvUSpkg:maven/org.xwiki.platform/xwiki-platform-livedata-livetable
- Maven org.xwiki.platform:xwiki-platform-livedata-livetable18.0.0-rc-1 → 18.1.0-rc-1osvUSpkg:maven/org.xwiki.platform/xwiki-platform-livedata-livetable
advisories (2)
Vendor and ecosystem advisories describing this.
- WID-SEC-W-2026-1904xwiki (Live Data): Schwachstelle ermöglicht PrivilegieneskalationDeutsch2026-06-11csaf · cert_bundDE
Ein entfernter, authentisierter Angreifer kann eine Schwachstelle in xwiki ausnutzen, um seine Privilegien zu erhöhen.
- GHSA-45ph-gxxr-gwgwXWiki Platform Live Data Live Table Connector has privilege escalation from edit to script right through Live Data editing2026-08-19ghsa · osvUS
### 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.
sources
Which sources assert this record, and when.
references (10) nvd
External citations — patches, advisories, analysis.
- https://github.com/xwiki/xwiki-platform/commit/1ddb954767e50782be960b953b012c1242f6843b
- https://github.com/xwiki/xwiki-platform/commit/448b0f074cc6711410eb2647c4740454c92d1626
- https://github.com/xwiki/xwiki-platform/commit/778b82b4806ce7ebddb775f953545ff73b841f8b
- https://github.com/xwiki/xwiki-platform/commit/fbad7dac8f46c560577e41b9259cbbbbd343e6fc
- https://github.com/xwiki/xwiki-platform/releases/tag/xwiki-platform-16.10.17
- https://github.com/xwiki/xwiki-platform/releases/tag/xwiki-platform-17.10.4
- https://github.com/xwiki/xwiki-platform/releases/tag/xwiki-platform-17.4.10
- https://github.com/xwiki/xwiki-platform/releases/tag/xwiki-platform-18.1.0-rc-1
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