{"id":"CVE-2022-2255","aliases":["BIT-mod_wsgi-2022-2255","GHSA-7527-8855-9cf8","PYSEC-2022-254"],"url":"https://o3.security/vulnerability/CVE-2022-2255","summary":"Incorrect header handling in mod-wsgi","details":"A vulnerability was found in mod_wsgi. The X-Client-IP header is not removed from a request from an untrusted proxy, allowing an attacker to pass the X-Client-IP header to the target WSGI application because the condition to remove it is missing.","published":"2022-08-25T17:26:19Z","modified":"2026-08-12T03:51:27.672336433Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":2,"affectedPackages":[{"ecosystem":"PyPI","name":"mod-wsgi","fixedVersion":"4.9.3"}],"fix":null,"references":[{"type":"WEB","url":"https://github.com/GrahamDumpleton/mod_wsgi/blob/4.9.2/src/server/mod_wsgi.c#L13940-L13941"},{"type":"WEB","url":"https://github.com/GrahamDumpleton/mod_wsgi/blob/4.9.2/src/server/mod_wsgi.c#L14046-L14082"},{"type":"WEB","url":"https://modwsgi.readthedocs.io/en/latest/release-notes/version-4.9.3.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/2xxx/CVE-2022-2255.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-2255"},{"type":"ARTICLE","url":"https://lists.debian.org/debian-lts-announce/2022/09/msg00021.html"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:27.672336433Z"}}