#VU111980 Protection Mechanism Failure in urllib3 - CVE-2025-50182

Vulnerability identifier: #VU111980

Vulnerability risk: Low

CVSSv4.0: 1.7 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2025-50182

CWE-ID: CWE-693

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
urllib3
Web applications / Modules and components for CMS

Vendor: urlib3

Description

The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due to incorrect implementation of the Redirect object when handling redirects and retries in a Pyodide runtime. A remote attacker can force the library to follow redirects even if explicitly disabled.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

urllib3: 2.0.0, 2.0.1, 2.0.2, 2.0.3, 2.0.4, 2.0.5, 2.0.6, 2.0.7, 2.1.0, 2.2.0, 2.2.1, 2.2.2, 2.2.3, 2.3.0, 2.4.0

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External links
https://github.com/urllib3/urllib3/commit/7eb4a2aafe49a279c29b6d1f0ed0f42e9736194f
https://github.com/urllib3/urllib3/security/advisories/GHSA-48p4-8xcf-vxj5

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.