CVE-2025-62168
Squid vulnerable to information disclosure via authentication credential leakage in error handling
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.
INFO
Published Date :
Oct. 17, 2025, 5:15 p.m.
Last Modified :
Nov. 5, 2025, 5:15 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | CRITICAL | [email protected] | ||||
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Update Squid to version 7.2 or later.
- Configure squid.conf with email_err_data off.
- Disable debug information in mailto links.
- Redact HTTP authentication credentials in error handling.
Public PoC/Exploit Available at Github
CVE-2025-62168 has a 3 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2025-62168.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-62168 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2025-62168
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
PoC of CVE-2025-62168
Python
PoC of CVE-2025-62168
Python
DSA and DLA for Debian last 14 days
Python
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-62168 vulnerability anywhere in the article.
-
Daily CyberSecurity
Critical Squid Proxy Flaw (CVE-2025-62168, CVSS 10.0) Leaks HTTP Credentials and Security Tokens via Error Handling
The developers of Squid, the widely used open-source caching proxy for web traffic acceleration, have disclosed and patched a critical information disclosure vulnerability tracked as CVE-2025-62168 (C ... Read more
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Daily CyberSecurity
GlassWorm Supply Chain Worm Uses Invisible Unicode and Solana Blockchain for Stealth C2
Cybersecurity researchers at Koi Security have discovered the world’s first self-propagating malware targeting VS Code extensions on the OpenVSX Marketplace. Dubbed GlassWorm, the threat marks a histo ... Read more
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Daily CyberSecurity
Critical Keras 3 RCE Flaw (CVE-2025-49655, CVSS 9.8) Allows Code Execution on Model Load
Researchers at HiddenLayer have disclosed a critical arbitrary code execution vulnerability in the Keras 3 deep learning framework (CVE-2025-49655, CVSS 9.8), which affects the Torch backend of Keras ... Read more
The following table lists the changes that have been made to the
CVE-2025-62168 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 05, 2025
Action Type Old Value New Value Added Reference http://www.openwall.com/lists/oss-security/2025/11/05/6 -
Initial Analysis by [email protected]
Oct. 29, 2025
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Added CPE Configuration OR *cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:* versions up to (excluding) 7.2 Added Reference Type GitHub, Inc.: https://github.com/squid-cache/squid/commit/0951a0681011dfca3d78c84fd7f1e19c78a4443f Types: Patch Added Reference Type GitHub, Inc.: https://github.com/squid-cache/squid/security/advisories/GHSA-c8cc-phh7-xmxr Types: Mitigation, Third Party Advisory -
New CVE Received by [email protected]
Oct. 17, 2025
Action Type Old Value New Value Added 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. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N Added CWE CWE-209 Added CWE CWE-550 Added Reference https://github.com/squid-cache/squid/commit/0951a0681011dfca3d78c84fd7f1e19c78a4443f Added Reference https://github.com/squid-cache/squid/security/advisories/GHSA-c8cc-phh7-xmxr