Improper Authentication in REDAXO - #VU140851
Published: August 4, 2026
Vulnerability identifier: #VU140851
CSH Severity: High
CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-287
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to bypass authentication and obtain a backend session for an existing account.
The vulnerability exists due to improper authentication in the temporary login token handling of the structure/history plugin when processing a temporary frontend login request. A remote attacker can bring the secret into a predictable state and forge a temporary login token to bypass authentication and obtain a backend session for an existing account.
Only installations with the structure/history plugin installed and activated are vulnerable, and the issue can affect administrator accounts.
Affected software
REDAXO
Remediation
Install security update from vendor's website.
REDAXO - update to 5.21.4