#VU112073 Input validation error in mod_auth_openidc - CVE-2025-3891
Published: July 1, 2025
Vulnerability identifier: #VU112073
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2025-3891
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
mod_auth_openidc
mod_auth_openidc
Software vendor:
ZmartZone IAM
ZmartZone IAM
Description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient validation of user-supplied input when OIDCPreservePost is enabled in mod_auth_openidc. A remote attacker can send an HTTP POST request without a Content-Type header and crash the web server.
Remediation
Install updates from vendor's website.