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CVE-2025-23217

CVE-2025-23217 · Mitmweb API Authentication Bypass Using Proxy Server

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 8.2 · High · EPSS 0.9% · Fix available

Published
Updated

Stack: system · python

Affected products and versions

  • mitmproxy

    Versions
    • < 11.1.2: Affected

    No fix published

  • mitmproxy Debian:12

    Versions
    • 8.1.1-2
    • 8.1.1-3
    • 8.1.1-4
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • mitmproxy Debian:14

    Versions
    • 0.10-1
    • 0.10-2
    • 0.10.1-1
    • 0.10.1-2
    • 0.11.3-1
    • 0.11.3-2
    • 0.11.3-3
    • 0.12.1-1
    • 0.12.1-2
    • 0.13-1
    • 0.15-1
    • 0.15-2
    • 0.18.1-1
    • 0.18.1-2
    • 0.18.2-1
    • 0.18.2-2
    • 0.18.2-3
    • 0.18.2-4
    • 0.18.2-5
    • 0.18.2-6
    • 0.6-1
    • 0.6-2
    • 0.6-3
    • 0.7-1
    • 0.8-1
    • 0.8-2
    • 0.9.1-1
    • 0.9.1-2
    • 0.9.2-1
    • 0.9.2-2
    • 2.0.2-1
    • 2.0.2-2
    • 2.0.2-3
    • 2.0.2-4
    • 3.0.3-1
    • 3.0.4-1
    • 4.0.4-1
    • 4.0.4-2
    • 4.0.4-3
    • 4.0.4-4
    • 4.0.4-5
    • 4.0.4-6
    • 4.0.4-6.1
    • 5.1.1-1
    • 5.1.1-2
    • 5.3.0-1
    • 5.3.0-2
    • 5.3.0-3
    • 6.0.2-1
    • 6.0.2-2
    • 8.1.1-1
    • 8.1.1-2
    • 8.1.1-3
    Affected ranges
    • ECOSYSTEM: < 8.1.1-4

    Update to 8.1.1-4

  • mitmproxy PyPI

    Versions
    • 0.10
    • 0.10.1
    • 0.11
    • 0.11.1
    • 0.11.2
    • 0.11.3
    • 0.12.0
    • 0.12.1
    • 0.13
    • 0.14.0
    • 0.15
    • 0.16
    • 0.17
    • 0.18.1
    • 0.18.2
    • 0.18.3
    • 0.8
    • 0.8.1
    • 0.9
    • 0.9.1
    • 0.9.2
    • 1.0.0
    • 1.0.1
    • 1.0.2
    • 10.0.0
    • 10.1.0
    • 10.1.1
    • 10.1.2
    • 10.1.3
    • 10.1.4
    • 10.1.5
    • 10.1.6
    • 10.2.0
    • 10.2.1
    • 10.2.2
    • 10.2.3
    • 10.2.4
    • 10.3.0
    • 10.3.1
    • 10.4.0
    • 10.4.1
    • 10.4.2
    • 11.0.0
    • 11.0.1
    • 11.0.2
    • 11.1.0
    • 2.0.0
    • 2.0.1
    • 2.0.2
    • 3.0.0
    • 3.0.1
    • 3.0.2
    • 3.0.3
    • 3.0.4
    • 4.0.0
    • 4.0.1
    • 4.0.3
    • 4.0.4
    • 5.0.0
    • 5.0.1
    • 5.1.0
    • 5.1.1
    • 5.2
    • 5.3.0
    • 6.0.0
    • 6.0.1
    • 6.0.2
    • 7.0.0
    • 7.0.1
    • 7.0.2
    • 7.0.3
    • 7.0.4
    • 8.0.0
    • 8.1.0
    • 8.1.1
    • 9.0.0
    • 9.0.1
    Affected ranges
    • ECOSYSTEM: < 11.1.2

    Update to 11.1.2

  • mitmproxy Ubuntu:16.04:LTS

    Versions
    • 0.11.3-3
    • 0.12.1-2
    • 0.13-1
    • 0.15-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • mitmproxy Ubuntu:18.04:LTS

    Versions
    • 2.0.2-2
    • 2.0.2-3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • mitmproxy Ubuntu:20.04:LTS

    Versions
    • 4.0.4-6
    • 4.0.4-6.1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • mitmproxy Ubuntu:22.04:LTS

    Versions
    • 6.0.2-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • mitmproxy Ubuntu:24.04:LTS

    Versions
    • 8.1.1-2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • mitmproxy Ubuntu:25.10

    Versions
    • 8.1.1-2
    • 8.1.1-3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • mitmproxy Ubuntu:26.10

    Versions
    • 8.1.1-4
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • mitmproxy Ubuntu:26.04:LTS

    Versions
    • 8.1.1-3
    • 8.1.1-4
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

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