What is CVE-2026-100524?

CVE-2026-100524 is a medium-severity vulnerability in Cotonti, classified under Cross-Site Request Forgery (CSRF). CVSS score: 5.4/10. Published 2026-09-26.

How severe is CVE-2026-100524?

Medium severity. CVSS v3 base score is 5.4 out of 10.

CSRF in Cotonti

CVE-2026-100524

Cotonti through 1.0.0 contains a cross-site request forgery vulnerability in the extensions manager that allows attackers to perform state-changing actions without anti-CSRF token validation. Attackers can craft links or embed images to force administrators to install, update, pause, or unpause extensions by tricking them into visiting a malicious page while authenticated.

Vulnerability class: CSRF (Cross-Site Request Forgery)

Published 2026-09-26 · last modified 2026-09-26.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Cotonti

Weakness classification (CWE)

CWE-352 — Cross-Site Request Forgery (CSRF)

References

github.com/Cotonti/Cotonti (product)
github.com/Cotonti/Cotonti/blob/1.0.0/system/admin/admin.extensions.php (technical-description)
github.com/Cotonti/Cotonti/issues/1907 (issue-tracking)
github.com/Cotonti/Cotonti/pull/1908 (issue-tracking, patch)
www.vulncheck.com/advisories/cotonti-through-1.0.0-cross-site-request-forgery-v… (third-party-advisory)

Frequently asked questions

What is CVE-2026-100524?: CVE-2026-100524 is a medium-severity vulnerability in Cotonti, classified under Cross-Site Request Forgery (CSRF). CVSS score: 5.4/10. Published 2026-09-26.
How severe is CVE-2026-100524?: Medium severity. CVSS v3 base score is 5.4 out of 10.