CVE-2022-2255

Exp

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: 2022-08-25 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2022-2255 is rated High Exploit Risk (61.7/100): CVSS High severity, with low exploitation likelihood (EPSS 0.67%). 2 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2022-2255

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2022-2255

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.46% 0.67% +0.21%
2 2026-05-25 0.68% 0.46% -0.22%
3 2026-04-14 — 0.68% —

Full EPSS history (18 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2022-2255

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 3.6 [email protected]

Weakness enumeration for CVE-2022-2255

GitHub Security Advisory for CVE-2022-2255

GHSA-7527-8855-9cf8 · Severity: high · Ecosystem: pip — Incorrect header handling in mod-wsgi

OS Trackers for CVE-2022-2255

vendor priority summary link
debian not yet assigned CVE-2022-2255 not yet assigned priority: Debian including 1 source packages (mod-wsgi), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2022-2255
redhat medium — https://access.redhat.com/security/cve/CVE-2022-2255
suse medium — https://www.suse.com/security/cve/CVE-2022-2255/
ubuntu medium CVE-2022-2255 medium priority: Ubuntu including 1 source packages (mod-wsgi), 7 status rows across 7 suites (bionic, focal, jammy, kinetic, trusty, upstream, xenial): released 4, not-affected 2, needs-triage 1. https://ubuntu.com/security/CVE-2022-2255

Affected software / configurations for CVE-2022-2255

Vendor Product Version Raw CPE
modwsgi mod_wsgi < 4.9.3 cpe:2.3:a:modwsgi:mod_wsgi:*:*:*:*:*:*:*:*
debian debian_linux 10.0 cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

References for CVE-2022-2255

cvelogic Threat Intelligence