Squid Web Proxy up to 7.1 information exposure

Summaryinfo

A vulnerability, which was classified as problematic, was found in Squid Web Proxy up to 7.1. This affects an unknown part. Such manipulation leads to information exposure. This vulnerability is documented as CVE-2025-62168. The attack can be executed remotely. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Squid Web Proxy up to 7.1 and classified as problematic. Affected by this issue is some unknown functionality. The manipulation with an unknown input leads to a information exposure vulnerability. Using CWE to declare the problem leads to CWE-209. The product generates an error message that includes sensitive information about its environment, users, or associated data. Impacted is confidentiality. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability is handled as CVE-2025-62168 since 10/07/2025. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 01/17/2026). This vulnerability is assigned to T1592 by the MITRE ATT&CK project.

The vulnerability scanner Nessus provides a plugin with the ID 271681 (Linux Distros Unpatched Vulnerability : CVE-2025-62168), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 7.2 eliminates this vulnerability. Applying the patch 0951a0681011dfca3d78c84fd7f1e19c78a4443f is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (271681), EUVD (EUVD-2025-34894) and CERT Bund (WID-SEC-2025-2334). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

• Debian Linux
• Amazon Linux 2
• Red Hat Enterprise Linux
• Ubuntu Linux
• SUSE Linux
• Oracle Linux
• SUSE openSUSE
• RESF Rocky Linux
• Open Source Squid
• Securepoint UTM

Productinfo

Type

• Firewall Software

Vendor

• Squid

Name

• Web Proxy

Version

• 7.0
• 7.1

License

• open-source

Website

• Vendor: http://www.squid-cache.org/

CPE 2.3info

• 🔒
• 🔒

CPE 2.2info

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• 🔒

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Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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