CVE-2025-61674: October CMS Vulnerable to Stored XSS via Editor and Branding Styles

medium Affects october/system. Feed 2026.10.29.1, updated 2026-10-28; published 2026-01-09; advisory modified 2026-02-03.

October CMS Vulnerable to Stored XSS via Editor and Branding Styles

Package: october/system Composer
Affected versions: <3.7.13 or >=4.0.0 and <4.0.12
Fixed in: 3.7.13, 4.0.12
Severity: medium CVSS 6.1
Exploitation: not on CISA KEV · EPSS 0% (19.7th percentile)
Published: 2026-01-09
Source: osv.dev

References

CWE-79

NVD record october/system advisories

Am I affected?

Find out in one command. phpwarden checks your composer.lock against this advisory and 20,000+ others, ranked by real-world exploitation (CISA KEV + EPSS). Free, offline, open data.

# one-time install
pip install phpwarden

# then
phpwarden deps composer.lock

Or keep it checked automatically: GitHub Action · pre-commit hook · GitLab CI · Laravel artisan command

Install docs How findings are ranked

Related advisories

CVE-2021-32648 KEV high Account Takeover in Octobercms same package: october/system
CVE-2022-21705 high Authenticated remote code execution in October CMS same package: october/system
CVE-2021-32650 high october/system arbitrary code execution same package: october/system
CVE-2022-24800 high October CMS upload process vulnerable to RCE via Race Condition same package: october/system
CVE-2021-32649 high October/System authenticated file write leads to remote code execution same package: october/system
CVE-2021-41126 high Deleted Admin Can Sign In to Admin Interface same package: october/system