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CVE-2025-62168

Squid vulnerable to information disclosure via authentication credential leakage in error handling

Published: Oct 17, 2025Updated: Nov 5, 2025 Sources: CVE List NVD BDUCWE-209
NVD MITRE
10.0CVSSCRITICAL
EPSS Score
63.3%
Top 0.9%
CISA KEV
Not in KEV
Exploits
1 Known
Remediation
Patch Available
Am I actually vulnerable?1 Nuclei template available — see how to check your systems. How to verify

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 Vector Breakdown

AV:NAC:LPR:NUI:NS:CC:HI:HA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:NAvailability
None
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Weaknesses

CWE-209CWE-550

Affected Products

squidsquid-cache
On-premNetwork Device
Networking Infrastructure / load-balancer-proxy
РЕД ОСООО «Ред Софт»
On-premOS
Operating Systems / linux-distro
Astra Linux Special EditionООО «РусБИТех-Астра»
On-premOS
Operating Systems / linux-distro
РОСА КобальтАО «НТЦ ИТ РОСА»
On-prem
Operating Systems / linux-distro
АЛЬТ СП 10АО «ИВК»
On-premOS
Operating Systems / linux-distro
squid-cacheoss-projectNetworking Infrastructureaka squid, squid cache
ооо «ред софт»commercialRUOperating Systemsaka red soft
ооо «русбитех-астра»commercialRUOperating Systemsaka rusbitech-astra
ао «нтц ит роса»commercialRUOperating Systems
ао «ивк»commercialRUOperating Systemsaka ivk
and 3 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

1 exploit source identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available
Workaround Available

MITRE ATT&CK

1 technique
Discovery
View detailed technique mapping

References

https://github.com/squid-cache/squid/security/advisories/GHSA-c8cc-phh7-xmxr
github.com
https://github.com/squid-cache/squid/commit/0951a0681011dfca3d78c84fd7f1e19c78a4443f
github.com
https://github.com/squid-cache/squid/security/advisories/GHSA-c8cc-phh7-xmxr
github.com
and 9 more references View all →

Timeline

Published
Oct 17, 2025
Last Updated
Nov 5, 2025

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