Vulnerability Description
Squid is a caching proxy for the Web. In Squid versions prior to 7.2, a failure to redact HTTP authentication credentials in error handling allows information disclosure. The vulnerability allows a script to bypass browser security protections and learn the credentials a trusted client uses to authenticate. This potentially allows a remote client to identify security tokens or credentials used internally by a web application using Squid for backend load balancing. These attacks do not require Squid to be configured with HTTP authentication. The vulnerability is fixed in version 7.2. As a workaround, disable debug information in administrator mailto links generated by Squid by configuring squid.conf with email_err_data off.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Squid-Cache | Squid | < 7.2 |
Related Weaknesses (CWE)
References
- https://github.com/squid-cache/squid/commit/0951a0681011dfca3d78c84fd7f1e19c78a4Patch
- https://github.com/squid-cache/squid/security/advisories/GHSA-c8cc-phh7-xmxrMitigationThird Party Advisory
- http://www.openwall.com/lists/oss-security/2025/11/05/6
FAQ
What is CVE-2025-62168?
CVE-2025-62168 is a vulnerability with a CVSS score of 10.0 (CRITICAL). Squid is a caching proxy for the Web. In Squid versions prior to 7.2, a failure to redact HTTP authentication credentials in error handling allows information disclosure. The vulnerability allows a sc...
How severe is CVE-2025-62168?
CVE-2025-62168 has been rated CRITICAL with a CVSS base score of 10.0/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2025-62168?
Check the references section above for vendor advisories and patch information. Affected products include: Squid-Cache Squid.