PT-2026-42546 · Unknown · Concrete Cms

Vincent55 · Published 2026-05-21 · Updated 2026-05-26 · CVE-2026-8350

Positive Technologies (AI Summary)

CVSS v3.1

8.8

High

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Concrete CMS versions 9.5.0 and earlier

Description Missing authorization in the 'bulk user assignment.php' endpoint allows an authenticated user with access to the bulk user assignment dashboard page to perform privilege escalation to the Administrative Group. This allows the user to add any email address to any group or remove legitimate administrators.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

LPE

Incorrect Authorization

Weakness Enumeration

CWE-863

Related Identifiers

CVE-2026-8350

Affected Products

Concrete Cms

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-8350 · Security Note
• https://t.me/cveNotify/164722 · Telegram Post
• https://documentation.concretecms.org/9-x/developers/introduction/version-history/951-release-notes · Note
• https://t.me/CVEtracker/54552 · Telegram Post