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MEDIUM severity

CVE-2023-33195 — cms

MEDIUMFix: craftcms/cms@b77cb30

CVE-2023-33195 is a medium-severity (CVSS 5) Cross-site Scripting (XSS) vulnerability in craftcms/cms. 1 public exploit or proof-of-concept reference is indexed, so weaponization risk is real. A fix is available for craftcms/cms — see the affected versions and patch details below.

Craft CMS XSS in RSS widget feed

Also known asGHSA-qpgm-gjgf-8c2x
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
1 known
Exploitation data as of Nov 3, 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 CVE-2023-33195.

EPSS Exploitation Probability

via FIRST.org ↗
0.7%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs51th percentile — riskier than 51% of all scored CVEsHighest risk
0.01%0.47%0.92%1.38%0.5%0.7%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

Summary

A malformed RSS feed can deliver an XSS payload

PoC

Create an RSS widget and add the domain https://blog.whitebear.vn/file/rss-xss2.rss The XSS payload will be triggered by the title in tag <item>

Resolved in https://github.com/craftcms/cms/commit/b77cb3023bed4f4a37c11294c4d319ff9f598e1f

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐘Packagistcraftcms/cms≥ 4.3.0&&< 4.4.64.4.6composer require craftcms/cms:^4.4.6

Affected Products

1 product · 1 configurations
Application
craft cmscraftcms
≥ 4.3.0 && < 4.4.6
range
Exploits & PoCs
1

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

Craft is a CMS for creating custom digital experiences on the web. A mal…

github.comNVDJun 2023

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 4.4.6 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2023-33195 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

### Summary A malformed RSS feed can deliver an XSS payload ### PoC Create an RSS widget and add the domain https://blog.whitebear.vn/file/rss-xss2.rss The XSS payload will be triggered by the title in tag `<item>` Resolved in https://github.com/craftcms/cms/commit/b77cb3023bed4f4a37c11294c4d319ff9f598e1f
O3 Security · Impact-Aware SCA

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CVE-2023-33195: cms XSS — Fixed in 4.4.6