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CVE-2025-49587 — xwiki-platform-notificati…

Fix: xwiki/xwiki-platform@55c5d56

CVE-2025-49587 is a CWE-357 vulnerability in org.xwiki.platform:xwiki-platform-notifications-notifiers-default. A fix is available for org.xwiki.platform:xwiki-platform-notifications-notifiers-default — see the affected versions and patch details below.

XWiki does not require right warnings for notification displayer objects

Also known asGHSA-j7p2-87q3-44w7
Published
Updated
Affected
3 pkgs
Patched
3 / 3
Exploits
None indexed
Exploitation data as of Nov 6, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

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 CVE-2025-49587.

EPSS Exploitation Probability

via FIRST.org ↗
0.4%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs38th percentile — riskier than 38% of all scored CVEsHighest risk
0.00%0.37%0.75%1.12%0.6%0.4%May 26Sep 26Nov 26

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

Real-World Exposure

3 pkgs affected
☕org.xwiki.platform:xwiki-platform-notifications-notifiers-default☕org.xwiki.platform:xwiki-platform-notifications-notifiers-default☕org.xwiki.platform:xwiki-platform-notifications-notifiers-default

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

When a user without script right creates a document with an XWiki.Notifications.Code.NotificationDisplayerClass object, and later an admin edits and saves that document, the possibly malicious content of that object is output as raw HTML, allowing XSS attacks. While the notification displayer executes Velocity, the existing generic analyzer already warns admins before editing Velocity code. Note that warnings before editing documents with dangerous properties have only been introduced in XWiki 15.9, before that version, this was a known issue and the advice was simply to be careful.

Patches

This vulnerability has been patched in XWiki 15.10.16, 16.4.7, and 16.10.2 by adding a required rights analyzer that warns the admin before editing about the possibly malicious code.

Workarounds

We're not aware of any real workarounds apart from just being careful with editing documents previously edited by untrusted users as a user with script, admin or programming right.

Affected Packages

3 total 3 fixed
EcosystemPackageVulnerable rangeFix
☕Mavenorg.xwiki.platform:xwiki-platform-notifications-notifiers-default≥ 15.9-rc-1&&< 15.10.1615.10.16org.xwiki.platform:xwiki-platform-notifications-notifiers-default:15.10.16
☕Mavenorg.xwiki.platform:xwiki-platform-notifications-notifiers-default≥ 16.0.0-rc-1&&< 16.4.716.4.7org.xwiki.platform:xwiki-platform-notifications-notifiers-default:16.4.7
☕Mavenorg.xwiki.platform:xwiki-platform-notifications-notifiers-default≥ 16.5.0-rc-1&&< 16.10.216.10.2org.xwiki.platform:xwiki-platform-notifications-notifiers-default:16.10.2

Affected Products

1 product · 3 configurations
Application
xwikixwiki
≥ 16.5.0 && < 16.10.2
range

Detection & mitigation playbook

Open-source dependency

  1. Detect

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

  2. Fix

    Update org.xwiki.platform:xwiki-platform-notifications-notifiers-default to 15.10.16 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2025-49587 is resolved across your whole dependency graph.

  3. Workarounds

    Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

Frequently Asked Questions

### Impact When a user without script right creates a document with an `XWiki.Notifications.Code.NotificationDisplayerClass` object, and later an admin edits and saves that document, the possibly malicious content of that object is output as raw HTML, allowing XSS attacks. While the notification displayer executes Velocity, the existing generic analyzer already warns admins before editing Velocity code. Note that warnings before editing documents with dangerous properties have only been introduced in XWiki 15.9, before that version, this was a known issue and the advice was simply to be carefu
O3 Security · Impact-Aware SCA

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CVE-2025-49587: xwiki-platform — Fixed in 15.10.16