En resumen
- CVE-2026-8340 es una vulnerabilidad MEDIO (CVSS 4.3) que afecta a concrete5/concrete5, concrete cms (concretecms).
- Probabilidad de explotación en los próximos 30 días (EPSS): 0.10%, mayor que el 0.95% de las vulnerabilidades.
- Solución: actualizar a 9.5.1 o posterior.
Description
Concrete CMS 9.5.0 and below is vulnerable to CSRF via Backend\File::approveVersion. Victim with edit_file_contents permission is CSRF'd into publishing an attacker-chosen previously-uploaded version (downgrade to an older version of a file, or activation of a co-editor's unpublished version). Thanks Winston Crooker for reporting.
NVD description
Concrete CMS 9.5.0 and below is vulnerable to CSRF via Backend\File::approveVersion. Victim with edit_file_contents permission is CSRF'd into publishing an attacker-chosen previously-uploaded version (downgrade to an older version of a file, or activation of a co-editor's unpublished version). The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 2.3 with vector CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N. Thanks Winston Crooker for reporting.
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