šŸ›”ļø CVE-2026-8134
šŸŸ  CVSS 7.2 ā€” High āœ… No Known Exploit CWE-23 NVD
7.2
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Concrete CMS 9.5.0 and below fails to sanitize path traversal sequences in the ptComposerFormLayoutSetControlCustomTemplate field when saving page type composer form layouts. An authenticated rogue administrator with composer form editing rights can exploit this to include arbitrary readable files on the server. Combined with the file uploader's extension-only validation (which permits PHP code in files saved with image extensions like .png), this can result inĀ authenticated remote code execution.Ā The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 9.4 with vectorĀ CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:HĀ  Ā ThanksĀ Yonatan DroriĀ (Tenzai)Ā for reporting.

Details

Severity HIGH
CVSS Score 7.2
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CWE CWE-23
Public Exploit āœ… No
Source NVD
Published 2026-05-21
Updated 2026-06-02
Modified 2026-05-26
Fix URL N/A

Affected Packages

Software From version Fixed in
concrete-cms ā€” 9.5.0
unknown ā€” ā€”

Similar Threats

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