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MEDIUM severity

craftcms/cms vulnerable to cross site scripting in RSS feed widgetGHSA-j4mx-98hw-6rv6

MEDIUMFix: craftcms/cms@52bd161

GHSA-j4mx-98hw-6rv6 is a medium-severity (CVSS 6.1) Cross-site Scripting (XSS) vulnerability in craftcms/cms. A fix is available for craftcms/cms — see the affected versions and patch details below.

Also known asCVE-2023-31144
Published
Updated
Affected
2 pkgs
Patched
2 / 2
Exploits
None indexed
Exploitation data as of Nov 9, 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 GHSA-j4mx-98hw-6rv6.

EPSS Exploitation Probability

via FIRST.org ↗
0.4%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs35th percentile — riskier than 35% of all scored CVEsHighest risk
0.00%0.39%0.78%1.17%0.6%0.4%May 26Sep 26Nov 26

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

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

2 pkgs affected
🐘craftcms/cms🐘craftcms/cms

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.

Description

Craft CMS is a content management system. Starting in version 3.0.0 and prior to versions 3.8.4 and 4.4.4, a malformed title in the feed widget can deliver a cross-site scripting payload. This issue is fixed in version 3.8.4 and 4.4.4.

Affected Packages

2 total 2 fixed
EcosystemPackageVulnerable rangeFix
🐘Packagistcraftcms/cms≥ 3.0.0&&< 3.8.43.8.4composer require craftcms/cms:^3.8.4
🐘Packagistcraftcms/cms≥ 4.0.0&&< 4.4.44.4.4composer require craftcms/cms:^4.4.4

Affected Products

1 product · 2 configurations
Application
craft cmscraftcms
≥ 4.0.0 && ≤ 4.4.3
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 craftcms/cms, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update craftcms/cms to 3.8.4 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-j4mx-98hw-6rv6 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

A malformed title in the feed widget of craftcms/cms can deliver an XSS payload. This has been resolved in [this commit](https://github.com/craftcms/cms/commit/52bd161614620edbab2d24d078ca9ebca2528442).
O3 Security · Impact-Aware SCA

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craftcms/cms vulnerable to cross site scripting in RSS…