CVE-2026-8327
Concrete CMS has a session-hardening bypass and allows password change without reauthorization
EPSS 0.18%
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.
How to fix CVE-2026-8327
To remediate CVE-2026-8327, upgrade the affected package to a fixed version below.
- —upgrade to 9.5.1 or later
Is CVE-2026-8327 being exploited?
Low — EPSS is 0.2%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 9.5.1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | 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 |