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CVE-2021-3116 Details

Description

before_upstream_connection in AuthPlugin in http/proxy/auth.py in proxy.py before 2.3.1 accepts incorrect Proxy-Authorization header data because of a boolean confusion (and versus or).

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://cardaci.xyz/advisories/2021/01/10/proxy.py-2.3.0-broken-basic-authentication/	CVE	ExploitThird Party Advisory
https://github.com/abhinavsingh/proxy.py/pull/482/commits/9b00093288237f5073c403f2c4f62acfdfa8ed46	CVE	Patch
https://pypi.org/project/proxy.py/2.3.1/#history	CVE	Product
https://cardaci.xyz/advisories/2021/01/10/proxy.py-2.3.0-broken-basic-authentication/	[email protected]	ExploitThird Party Advisory
https://github.com/abhinavsingh/proxy.py/pull/482/commits/9b00093288237f5073c403f2c4f62acfdfa8ed46	[email protected]	Patch
https://pypi.org/project/proxy.py/2.3.1/#history	[email protected]	Product

see all 6 references

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-697	Incorrect Comparison	[email protected]

Affected Products

Product	Versions
proxy.py project proxy.py	< 2.3.1
CPE cpe:2.3:a:proxy.py_project:proxy.py:::::::: Remediation No remediation found in references.

Change History

5 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	[email protected]
Nov 21, 2024	CVE Modified	CVE
May 14, 2024	CVE Modified	[email protected]
Feb 15, 2024	Reanalysis	[email protected]
Jan 14, 2021	Initial Analysis	[email protected]