mitmproxy up to 11.1.1 authentication bypass

Summaryinfo

A vulnerability was found in mitmproxy up to 11.1.1. It has been classified as critical. The impacted element is an unknown function. Performing a manipulation results in authentication bypass. This vulnerability was named CVE-2025-23217. The attack may be initiated remotely. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in mitmproxy up to 11.1.1. It has been classified as critical. This affects an unknown code block. The manipulation with an unknown input leads to a authentication bypass vulnerability. CWE is classifying the issue as CWE-288. A product requires authentication, but the product has an alternate path or channel that does not require authentication. This is going to have an impact on confidentiality. The summary by CVE is:

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.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2025-23217 since 01/13/2025. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available.

Upgrading to version 11.1.2 eliminates this vulnerability. The upgrade is hosted for download at github.com.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Firewall Software

Name

• mitmproxy

Version

• 11.1.0
• 11.1.1

Website

• Product: https://github.com/mitmproxy/mitmproxy/

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CPE 2.2info

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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