CVE-2025-50181— urllib3 redirects are not disabled when retries are disabled on PoolManager instantiation
Quick assessment
Affected
urllib3 urllib3
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
urllib3是urllib3开源的一款Python HTTP库。该产品具有线程安全连接池、文件发布支持等。 urllib3 2.5.0之前版本存在输入验证错误漏洞，该漏洞源于禁用重定向的配置方式无法有效防止SSRF或开放重定向漏洞。
Possible ATT&CK Techniques 1 AI
T1557 · Adversary-in-the-Middle
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I. Basic Information for CVE-2025-50181
Vulnerability Information
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Vulnerability Title
urllib3 redirects are not disabled when retries are disabled on PoolManager instantiation
Source: CVE Program / CVE List V5
Vulnerability Description
urllib3 is a user-friendly HTTP client library for Python. Prior to 2.5.0, it is possible to disable redirects for all requests by instantiating a PoolManager and specifying retries in a way that disable redirects. By default, requests and botocore users are not affected. An application attempting to mitigate SSRF or open redirect vulnerabilities by disabling redirects at the PoolManager level will remain vulnerable. This issue has been patched in version 2.5.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
指向未可信站点的URL重定向(开放重定向)
Source: CVE Program / CVE List V5
Vulnerability Title
urllib3 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
urllib3是urllib3开源的一款Python HTTP库。该产品具有线程安全连接池、文件发布支持等。 urllib3 2.5.0之前版本存在输入验证错误漏洞，该漏洞源于禁用重定向的配置方式无法有效防止SSRF或开放重定向漏洞。
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)
Affected Products
II. Public POCs for CVE-2025-50181
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IV. Related Vulnerabilities
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Same vendor: urllib3
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V. Comments for CVE-2025-50181
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