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CVE-2025-23217PYSEC-2026-1630GHSA-WG33-5H85-7Q5P

Mitmweb API Authentication Bypass Using Proxy Server

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 11.1.2
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: yes
  • Technical impact: total

Summary

mitmproxy is a interactive TLS-capable intercepting HTTP proxy for penetration testers and software developers and mitmweb is a web-based interface for mitmproxy. In mitmweb 11.1.1 and below, a malicious client can use mitmweb's proxy server (bound to `*:8080` by default) to access mitmweb's internal API (bound to `127.0.0.1:8081` by default). In other words, while the cannot access the API directly, they can access the API through the proxy. An attacker may be able to escalate this SSRF-style access to remote code execution. The mitmproxy and mitmdump tools are unaffected. Only mitmweb is affected. This vulnerability has been fixed in mitmproxy 11.1.2 and above. Users are advised to upgrade. There are no known workarounds for this vulnerability.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: yes · Technical impact: total

  3. Record last updated

Affected versions

  • mitmproxy mitmproxy

    fixed in 11.1.2

  • mitmproxyPyPI

    fixed in 11.1.2

References 3

GitHub · mitmproxy/mitmproxy

en.wikipedia.org