How severe is CVE-2025-61676?

CVE-2025-61676 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2025-61676 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-61676?

CVE-2025-61676 affects Octobercms October. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-61676?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-61676 have an EU (EUVD) identifier?

Yes. CVE-2025-61676 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-1689.

When was CVE-2025-61676 published?

CVE-2025-61676 was published on 2026-01-10 and last updated on 2026-06-17.

CVE-2025-61676

CVE-2025-61676 is a medium-severity vulnerability in Octobercms October with a CVSS 3.x base score of 6.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
EPSS exploit prediction: 0% (8th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-1689
Weakness: CWE-79
Affected product: Octobercms October
Published: 2026-01-10
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2025-61676?: 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.
How severe is CVE-2025-61676?: CVE-2025-61676 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2025-61676 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-61676?: CVE-2025-61676 affects Octobercms October. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-61676?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-61676 have an EU (EUVD) identifier?: Yes. CVE-2025-61676 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-1689.
When was CVE-2025-61676 published?: CVE-2025-61676 was published on 2026-01-10 and last updated on 2026-06-17.

References

https://github.com/octobercms/october/security/advisories/GHSA-wvpq-h33f-8rp6

Affected products (1)

cpe:2.3:a:octobercms:october:*:*:*:*:*:*:*:*

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