GitHub Advisoryadvisory · Packagist

GHSA-wmw3-3fv3-h54w Concrete CMS has a session-hardening bypass and allows password change without reauthorization

MEDIUM Published 2026-05-22 Modified 2026-06-24 Official page ↗
Aliases
CVE-2026-8327
Ecosystem
Packagist
Packages
concrete5/concrete5
Severity
Moderate
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
Weaknesses
CWE-269
Reviewed
2026-06-24

Affected packages

• Packagist concrete5/concrete5: < 9.5.1 → fixed in 9.5.1

Description

Concrete CMS 9.5.0 and below is vulnerable to password change without reauthorization and session-hardening bypass. The user-profile edit controller passes the entire raw POST array to UserInfo::update() without field whitelisting resulting in password change without requiring the current password  and also resulting in registered users able to disable the per-user-IP-pinning in the session validator which is meant to detect hijacking.

Related

Alias · CVE (1)

  • CVE-2026-8327 Concrete CMS below 9.5.0 and below is vulnerable to password change without reauthorization and session-hardening bypass. vulnerability

Weakness · CWE (1)

  • CWE-269 Improper Privilege Management weakness

References