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MEDIUM severity

CVE-2023-2817 — cms

MEDIUMFix: craftcms/cms@7655e10

CVE-2023-2817 is a medium-severity (CVSS 5.4) Cross-site Scripting (XSS) vulnerability in craftcms/cms. A fix is available for craftcms/cms — see the affected versions and patch details below.

Stored cross site scripting in Craft CMS

Also known asGHSA-7x94-jx75-3gh6
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Nov 8, 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-2023-2817.

EPSS Exploitation Probability

via FIRST.org ↗
0.4%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs39th percentile — riskier than 39% of all scored CVEsHighest risk
0.00%0.31%0.63%0.94%0.2%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

1 pkg affected
🐘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

A post-authentication stored cross-site scripting vulnerability exists in Craft CMS versions <= 4.4.11. HTML, including script tags can be injected into field names which, when the field is added to a category or section, will trigger when users visit the Categories or Entries pages respectively. This issue was patched in version 4.4.12.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐘Packagistcraftcms/cms≥ 4.0.0-RC1&&< 4.4.124.4.12composer require craftcms/cms:^4.4.12

Affected Products

1 product · 1 configurations
Application
craft cmscraftcms
≤ 4.4.11
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 4.4.12 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2023-2817 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 post-authentication stored cross-site scripting vulnerability exists in Craft CMS versions <= 4.4.11. HTML, including script tags can be injected into field names which, when the field is added to a category or section, will trigger when users visit the Categories or Entries pages respectively. This issue was patched in version 4.4.12.
O3 Security · Impact-Aware SCA

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CVE-2023-2817: cms XSS — Fixed in 4.4.12