CVE-2024-8661: Concretecms Concrete CMS

Medium severity, CVSS 4.8. EPSS: 0.4% chance of exploitation in the next 30 days.

Concrete CMS versions 9.0.0 to 9.3.3 and below 8.5.19 are vulnerable to Stored XSS in the "Next&Previous Nav" block. A rogue administrator could add a malicious payload by executing it in the browsers of targeted users. The Concrete CMS Security Team gave this vulnerability a CVSS v4 score of 4.6 with vector CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N https://www.first.org/cvss/calculator/4.0#CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N  Since the "Next&Previous Nav" block output was not sufficiently sanitized, the malicious payload could be executed in the browsers of targeted users. Thanks, Chu Quoc Khanh for reporting.

Affected products

• Concretecms Concrete CMS: before 8.5.19 (fixed in 8.5.19); from 9.0, before 9.3.4 (fixed in 9.3.4)

Published 2024-09-16. Last modified 2026-06-17.