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CVE-2025-62168— Squid vulnerable to information disclosure via authentication credential leakage in error handling

Quick assessment

Affected
squid-cache squid
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Squid是Squid开源的一套代理服务器和Web缓存服务器软件。该软件提供缓存万维网、过滤流量、代理上网等功能。 Squid 7.2之前版本存在安全漏洞，该漏洞源于错误处理中未编辑HTTP身份验证凭据，可能导致信息泄露。

CVSS 10.0 · Critical EPSS 63.36% · P99

Public Exploits 1

Nuclei · 1 CVE-2025-62168.yaml [template]

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage
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I. Basic Information for CVE-2025-62168

Vulnerability Information
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Vulnerability Title
Squid vulnerable to information disclosure via authentication credential leakage in error handling
Source: CVE Program / CVE List V5
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过错误消息导致的信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
Squid 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Squid是Squid开源的一套代理服务器和Web缓存服务器软件。该软件提供缓存万维网、过滤流量、代理上网等功能。 Squid 7.2之前版本存在安全漏洞，该漏洞源于错误处理中未编辑HTTP身份验证凭据，可能导致信息泄露。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
squid-cache squid < 7.2 -

II. Public POCs for CVE-2025-62168

# POC Description Source Link Shenlong Link
1 PoC of CVE-2025-62168 https://github.com/monzaviman/CVE-2025-62168 POC Details
2 PoC of CVE-2025-62168 https://github.com/shahroodcert/CVE-2025-62168 POC Details
3 Proof-of-Concept (PoC) for CVE-2025-62168 👾 https://github.com/nehkark/CVE-2025-62168 POC Details
4 Squid versions prior to 7.2 fail to redact HTTP authentication credentials in error page responses. The Authorization header value is embedded in plain text inside the mailto: diagnostic block when Squid generates an error page (e.g. ERR_DNS_FAIL). https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2025/CVE-2025-62168.yaml POC Details
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III. Intelligence Information for CVE-2025-62168

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IV. Related Vulnerabilities

Same product: squid
Same vendor: squid-cache
Same weakness: CWE-209

V. Comments for CVE-2025-62168

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