CVE-2025-58060

A flaw was found in CUPS, a widely used printing service on Linux and UNIX-like systems. The issue arises when authentication is configured to use a method other than Basic, but the attacker sends an HTTP request with a Basic authentication header. Due to improper validation in the cupsdAuthorize() function, the password is not checked. This vulnerability allows attackers to bypass authentication entirely, resulting in unauthorized access to administrative functions and system configuration.

The Red Hat Product Security team has assessed the severity of this vulnerability as Important, given that it enables complete authentication bypass. Exploitation requires no valid credentials and can be performed remotely in some configurations. Attackers could gain administrative privileges in CUPS, modify critical configuration files, or potentially escalate their access further depending on the system environment. The root cause is a missing authentication check when the AuthType is set to values other than Basic but a Basic authorization header is supplied.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to a widespread installation base, or stability. It is strongly advised to apply vendor-supplied patches as soon as they are released to address this authentication bypass vulnerability.