CVE-2025-61676

mediumpriority · track · 19EPSS 0.003 · 20 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.27% (20th) EPSS

CVSS 4.8 · medium

Is it mine?

6 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · nvd · osv

EPSS · scored 2026-10-27

October is a Content Management System (CMS) and web platform. Prior to versions 3.7.13 and 4.0.12, a cross-site scripting (XSS) vulnerabilities was identified in October CMS backend configuration forms. A user with the Customize Backend Styles permission could inject malicious HTML/JS into the stylesheet input at Styles from Branding & Appearance settings. A specially crafted input could break out of the intended <style> context, allowing arbitrary script execution across backend pages for all users. This issue has been patched in versions 3.7.13 and 4.0.12.

cvss

Technical severity, 0–10. One row per scoring source.

6.1

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.14.8mediumCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:Nprimary · NVD / NIST USexploitability 1.7 · impact 2.7

v3.16.1mediumCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:Nsecondary · ENISA EU

v3.16.1mediumCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:Nsecondary · security-advisories@github.comexploitability 0.9 · impact 5.2

v3.16.1mediumCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:Nsecondary · OSV

v3.14.4mediumCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-79USCWE-79US

affected products (6)

Products and version ranges known to be affected.

octobercms October≤ < 3.7.13enisa_euvdEU
octobercms October4.0.0, → 4.0.12enisa_euvdEU
octobercms october< 3.7.13nvdUScpe:2.3:a:octobercms:october:*:*:*:*:*:*:*:*
octobercms october4.0.0 → 4.0.12nvdUScpe:2.3:a:octobercms:october:*:*:*:*:*:*:*:*
Packagist october/system< 3.7.13osvUSpkg:composer/october/system
Packagist october/system4.0.0 → 4.0.12osvUSpkg:composer/october/system

advisories (1)

Vendor and ecosystem advisories describing this.

GHSA-wvpq-h33f-8rp6October CMS Vulnerable to Stored XSS via Branding Styles2026-01-09ghsa · osvUS
A cross-site scripting (XSS) vulnerabilities was identified in October CMS backend configuration forms: - **Branding and Appearances Styles** A user with the `Customize Backend Styles` permission could inject malicious HTML/JS into the stylesheet input at *Settings → Branding & Appearance → Styles*. A specially crafted input could break out of the intended `<style>` context, allowing arbitrary script execution across backend pages for all users. --- ### Impact - Persistent XSS across the backend interface. - Exploitable by lower-privileged accounts with the above permissions. - Potential consequences include privilege escalation, session hijacking, and execution of unauthorized actions in victim sessions. --- ### Patches The vulnerability has been patched in **v4.0.12** and **v3.7.13**. Stylesheet inputs are now sanitized to prevent injection of arbitrary HTML/JS. All users are strongly encouraged to upgrade to the latest patched version. --- ### Workarounds If upgrading immediately is not possible: - Restrict the permissions `Customize Backend Styles` to fully trusted administrators only. This reduces exposure but does not fully eliminate risk. --- ### Credits - Reported by **[Nakkouch Tarek](https://github.com/nakkouchtarek)**

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd osv NVD CVE.org MITRE

published 2026-01-10modified 2026-06-17

references (5)

External citations — patches, advisories, analysis.

scry

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