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CVE-2025-49583 — xwiki-platform-notificati…

Fix: xwiki/xwiki-platform@3d96bf3

CVE-2025-49583 is a CWE-270 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 provides no warning when granting XWiki.Notifications.Code.NotificationEmailRendererClass admin right

Also known asGHSA-ff6v-w58f-v97w
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.

Exploitation and automatability from CISA’s SSVC triage for CVE-2025-49583.

EPSS Exploitation Probability

via FIRST.org ↗
0.3%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs19th percentile — riskier than 19% of all scored CVEsHighest risk
0.00%0.26%0.51%0.77%0.0%0.3%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.NotificationEmailRendererClass object, and later an admin edits and saves that document, the email templates in this object will be used for notifications. No malicious code can be executed, though, as while these templates allow Velocity code, the existing generic analyzer already warns admins before editing Velocity code. The main impact would thus be to send spam, e.g., with phishing links to other users or to hide notifications about other attacks. 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 has been patched in XWiki 16.10.2, 16.4.7 and 15.10.16 by adding an analysis for the respective XClass properties.

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-defaultall versions15.10.16org.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-2025-49583 is resolved across your whole dependency graph.

  3. 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.

Frequently Asked Questions

### Impact When a user without script right creates a document with an `XWiki.Notifications.Code.NotificationEmailRendererClass` object, and later an admin edits and saves that document, the email templates in this object will be used for notifications. No malicious code can be executed, though, as while these templates allow Velocity code, the existing generic analyzer already warns admins before editing Velocity code. The main impact would thus be to send spam, e.g., with phishing links to other users or to hide notifications about other attacks. Note that warnings before editing documents w
O3 Security · Impact-Aware SCA

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CVE-2025-49583: xwiki-platform — Fixed in 15.10.16