CVE-2025-62168

CRITICAL NUCLEI

Squid < 7.2 - Information Disclosure via HTTP Authentication Credential Leak in Error Handling

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 4 public exploits for CVE-2025-62168. PoCs published by monzaviman, adminlove520, shahroodcert. A Nuclei detection template is also available.

AI-analyzed exploit summary The repository contains a scanner for detecting CVE-2025-62168, an information disclosure vulnerability in Squid Proxy. It checks for the presence of HTTP Authentication credentials in error responses and determines if the target Squid Proxy version is vulnerable.

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.

Exploits (4)

github SCANNER 16 stars
by monzaviman · pythonpoc
https://github.com/monzaviman/CVE-2025-62168

The repository contains a scanner for detecting CVE-2025-62168, an information disclosure vulnerability in Squid Proxy. It checks for the presence of HTTP Authentication credentials in error responses and determines if the target Squid Proxy version is vulnerable.

Classification
Scanner 90%
Attack Type
Info Leak
Complexity
Moderate
Reliability
Reliable
Target: Squid Proxy (versions < 7.2)
No auth needed
Prerequisites: Network access to the Squid Proxy server · Squid Proxy server running a vulnerable version (< 7.2)
devstral-2 · analyzed Feb 19, 2026 Full analysis →
github SCANNER 2 stars
by adminlove520 · pythonpoc
https://github.com/adminlove520/CVE-Poc_All_in_One/tree/main/2025/CVE-2025-62168

The repository contains a Python script that scans for CVE-2025-62168, an information disclosure vulnerability in Squid Proxy due to improper redaction of HTTP Authentication credentials. The script checks the Squid version and attempts to detect the vulnerability by analyzing the error page response.

Classification
Scanner 90%
Attack Type
Info Leak
Complexity
Moderate
Reliability
Reliable
Target: Squid Proxy (versions < 7.2)
No auth needed
Prerequisites: Squid Proxy server with version < 7.2 · Network access to the target Squid Proxy
devstral-2 · analyzed Feb 27, 2026 Full analysis →
github SCANNER 1 stars
by shahroodcert · pythonpoc
https://github.com/shahroodcert/CVE-2025-62168

The repository contains a scanner for detecting CVE-2025-62168, an information disclosure vulnerability in Squid Proxy. It checks for the presence of HTTP Authentication credentials in error responses and verifies if the Squid version is vulnerable.

Classification
Scanner 90%
Attack Type
Info Leak
Complexity
Moderate
Reliability
Reliable
Target: Squid Proxy (versions < 7.2)
No auth needed
Prerequisites: Access to a Squid Proxy server · Network connectivity to the target
devstral-2 · analyzed Feb 19, 2026 Full analysis →
nomisec WORKING POC
by nehkark · poc
https://github.com/nehkark/CVE-2025-62168

This repository contains a functional PoC for CVE-2025-62168, an information disclosure vulnerability in Squid Proxy where sensitive HTTP headers (e.g., JWT tokens) are reflected in error pages via the mailto diagnostic block. The PoC demonstrates token leakage by forcing a Squid error and parsing the response.

Classification
Working Poc 95%
Attack Type
Info Leak
Complexity
Trivial
Reliability
Reliable
Target: Squid Proxy < 7.2
No auth needed
Prerequisites: Squid Proxy with email_err_data enabled · Network access to the proxy
devstral-2 · analyzed Feb 16, 2026 Full analysis →

Nuclei Templates (1)

Squid Proxy - HTTP Authentication Credentials Disclosure
CRITICALVERIFIEDby xtr0nix

Scores

CVSS v3 10.0
EPSS 0.1881
EPSS Percentile 95.5%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact total

Details

CWE
CWE-550 CWE-209
Status published
Products (1)
squid-cache/squid < 7.2
Published Oct 17, 2025
Tracked Since Feb 18, 2026