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Case File

CVE-2021-3116

HIGH · CVSS 7.5 EPSS 1.67% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-01-11 · Last synced 2026-08-04

CyberRota Analysis

This is a high severity vulnerability with a CVSS score of 7.5. Public exploit code or proof-of-concept references have been detected in its references.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

GitHub PoC Links
github.com ↗

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2021-3116
Severity
HIGH
CVSS
7.5
EPSS
1.67%

Original NVD 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).