CVE-2025-23217 json
Mitmweb API Authentication Bypass Using Proxy Server
published 2025-02-06 21 mo ago modified 2026-09-10 1 mo ago also EUVD-2025-3147 , GHSA-wg33-5h85-7q5p , PYSEC-2026-1630
- cvss
- 8.2
- version 4.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.9%
- EPSS 0.9% chance of exploitation in 30 days, percentile 59%
- public exploits
- 0
- none known
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.
Patch / fix
- pypi mitmproxy 11.1.2
- mitmproxy mitmproxy 11.1.2
- mitmproxy Debian 14 8.1.1-4
debian advisories DEBIAN-CVE-2025-23217
- python-mitmproxy openSUSE Tumbleweed 11.1.2-1.1
opensuse advisories openSUSE-SU-2025:14762-1
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- total
- Assessed
- 21 mo ago
Exploit prediction
0.87% chance of exploitation in the next 30 days, higher than 59% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 8.2 | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N |
| CNA | 4.0 | 8.2 | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | mitmproxy | <11.1.2 |
11.1.2 |
Affected products
- mitmproxy mitmproxy
Classification
References
-
github.com
/mitmproxy/mitmproxy/commit/fa89055e196d953f11fd241e36ee37858993486a
web
-
github.com
/mitmproxy/mitmproxy/security/advisories/GHSA-wg33-5h85-7q5p
web
-
en.wikipedia.org
/wiki/Server-side_request_forgery
web
-
github.com
/mitmproxy/mitmproxy/blob/main/CHANGELOG.md#06-february-2025-mitmproxy-1112
web
-
nvd.nist.gov
/vuln/detail/CVE-2025-23217
advisory
-
github.com
/mitmproxy/mitmproxy
package
-
github.com
/mitmproxy/mitmproxy/blob/main/CHANGELOG.md
web
-
pypi.org
/project/mitmproxy
package
-
github.com
/advisories/GHSA-wg33-5h85-7q5p
advisory
Sources
- CVE List CVE-2025-23217
- GitHub Advisory GHSA-wg33-5h85-7q5p
- NVD CVE-2025-23217
- OSV PYSEC-2026-1630
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.