CVE-2021-3733

MEDIUM Year: 2021
CVSS v3 Score
6.5
Medium
CVSS v2 Score
4.0
Medium
Weakness Type
CWE-400
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Vulnerability Description

There's a flaw in urllib's AbstractBasicAuthHandler class. An attacker who controls a malicious HTTP server that an HTTP client (such as web browser) connects to, could trigger a Regular Expression Denial of Service (ReDOS) during an authentication request with a specially crafted payload that is sent by the server to the client. The greatest threat that this flaw poses is to application availability.

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