VULNERABILITY INTELLIGENCE

CVE-2023-45132

CVSS score9.1 CRITICAL
EPSS probability0.98%
CISA KEVNot currently listed
Published2023-10-11
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Description

NAXSI is an open-source maintenance web application firewall (WAF) for NGINX. An issue present starting in version 1.3 and prior to version 1.6 allows someone to bypass the WAF when a malicious `X-Forwarded-For` IP matches `IgnoreIP` `IgnoreCIDR` rules. This old code was arranged to allow older NGINX versions to also support `IgnoreIP` `IgnoreCIDR` when multiple reverse proxies were present. The issue is patched in version 1.6. As a workaround, do not set any `IgnoreIP` `IgnoreCIDR` for older versions.

Weakness classification

  • security-advisories@github.com: CWE-693
  • nvd@nist.gov: NVD-CWE-noinfo

Primary references