# CVE-2026-53966: XWiki Platform: Privilege escalation from edit to script right through Live Data editing > Attackers with edit rights can escalate privileges to script rights via Live Data API, enabling code execution and bypassing security controls. - **Severity:** High 7.1 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N`) - **Exploited in the wild:** Not known - **Login needed:** Any signed-in user - **Attackable:** Over the internet - **Victim action needed:** Not needed - **Fix available:** Yes - **Published:** 15 Sep 2026 - **Updated:** 15 Sep 2026 - **Also known as:** GHSA-45ph-gxxr-gwgw ## What is CVE-2026-53966? CVE-2026-53966 is a high-severity vulnerability in xwiki-platform, published on 15 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim. ### Official description 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. Weakness: CWE-862 (Missing Authorization) ## Which versions are affected by CVE-2026-53966? 8 open source packages ship an affected version, including org.xwiki.platform:xwiki-platform-livedata-livetable. | Package | Ecosystem | Affected | Fixed in | | --- | --- | --- | --- | | `org.xwiki.platform:xwiki-platform-livedata-livetable` | Maven | From 13.4-rc-1 | 16.10.17 | | `org.xwiki.platform:xwiki-platform-livedata-livetable` | Maven | From 13.4-rc-1 | 16.10.17 | | `org.xwiki.platform:xwiki-platform-livedata-livetable` | Maven | From 17.0.0-rc-1 | 17.4.10 | | `org.xwiki.platform:xwiki-platform-livedata-livetable` | Maven | From 17.0.0-rc-1 | 17.4.10 | | `org.xwiki.platform:xwiki-platform-livedata-livetable` | Maven | From 17.5.0-rc-1 | 17.10.4 | | `org.xwiki.platform:xwiki-platform-livedata-livetable` | Maven | From 17.5.0-rc-1 | 17.10.4 | | `org.xwiki.platform:xwiki-platform-livedata-livetable` | Maven | From 18.0.0-rc-1 | 18.1.0-rc-1 | | `org.xwiki.platform:xwiki-platform-livedata-livetable` | Maven | From 18.0.0-rc-1 | 18.1.0-rc-1 | ## How do I fix CVE-2026-53966? Upgrade org.xwiki.platform:xwiki-platform-livedata-livetable to a fixed version for your release line: 16.10.17, 17.4.10, 17.10.4 or 18.1.0-rc-1. ## Is CVE-2026-53966 being exploited? There is no known exploitation of CVE-2026-53966 in the wild and no public exploit code. ## Fix prompt for AI coding agents ```text Check this codebase for CVE-2026-53966 and fix it if it is affected. What it is: CVE-2026-53966 is a high-severity vulnerability in xwiki-platform, published on 15 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim. Exploitation: There is no known exploitation of CVE-2026-53966 in the wild and no public exploit code. Affected packages and fixed versions: - org.xwiki.platform:xwiki-platform-livedata-livetable (Maven): affected from 13.4-rc-1; fixed in 16.10.17 - org.xwiki.platform:xwiki-platform-livedata-livetable (Maven): affected from 13.4-rc-1; fixed in 16.10.17 - org.xwiki.platform:xwiki-platform-livedata-livetable (Maven): affected from 17.0.0-rc-1; fixed in 17.4.10 - org.xwiki.platform:xwiki-platform-livedata-livetable (Maven): affected from 17.0.0-rc-1; fixed in 17.4.10 - org.xwiki.platform:xwiki-platform-livedata-livetable (Maven): affected from 17.5.0-rc-1; fixed in 17.10.4 - org.xwiki.platform:xwiki-platform-livedata-livetable (Maven): affected from 17.5.0-rc-1; fixed in 17.10.4 - org.xwiki.platform:xwiki-platform-livedata-livetable (Maven): affected from 18.0.0-rc-1; fixed in 18.1.0-rc-1 - org.xwiki.platform:xwiki-platform-livedata-livetable (Maven): affected from 18.0.0-rc-1; fixed in 18.1.0-rc-1 Task: 1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies. 2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it. 3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead. 4. Run the tests and summarise what changed and why. 5. If nothing in the project is affected, say so and change nothing. Reference: https://insights.sbomify.com/CVE-2026-53966/ (Markdown: https://insights.sbomify.com/CVE-2026-53966/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2026-53966 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-53966 - OSV: https://osv.dev/vulnerability/CVE-2026-53966 --- From sbomify Insights: https://insights.sbomify.com/CVE-2026-53966/ Summaries are generated and may contain mistakes; the official description above is the record.