{"id":"CVE-2023-45132","aliases":["EUVD-2023-49451","GHSA-7qjc-q4j9-pc8x"],"status":"published","title":"IgnoreIP/IgnoreCIDR should not trust X-Forwarded-For","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.","severity":{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00985,"percentile":0.6281,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-693"],"published":"2023-10-11T20:21:26Z","modified":"2026-10-28T10:36:25Z","products":[{"vendor":"wargio","product":"naxsi"}],"references":[{"url":"https://github.com/wargio/naxsi/security/advisories/GHSA-7qjc-q4j9-pc8x","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory","advisory"]},{"url":"https://github.com/wargio/naxsi/pull/103","tags":["x_refsource_MISC","x_transferred","Patch","fix"]},{"url":"https://github.com/wargio/naxsi/commit/1b712526ed3314dd6be7e8b0259eabda63c19537","tags":["x_refsource_MISC","x_transferred","Patch","fix"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/45xxx/CVE-2023-45132.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-45132","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2023-45132","title":"IgnoreIP/IgnoreCIDR should not trust X-Forwarded-For","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.\n","status":"published","published":"2023-10-11T20:21:26.313Z","modified":"2024-09-17T13:57:09.781Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","level":"critical","assessor":"cna"}],"cwes":["CWE-693"],"updated_at":"2026-11-02T14:35:22.984825Z"}],"euvd":[{"id":"EUVD-2023-49451","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.\n","status":"published","published":"2023-10-11T20:21:26Z","modified":"2024-09-17T13:57:09Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","level":"critical"}],"updated_at":"2026-11-03T00:28:22.305755Z"}],"nvd":[{"id":"CVE-2023-45132","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.\n","status":"published","published":"2023-10-11T21:15:10.207Z","modified":"2026-06-17T06:28:16.883Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","level":"critical","assessor":"secondary"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"}],"cwes":["CWE-693"],"updated_at":"2026-11-02T14:08:37.83429Z"}],"osv":[{"id":"CVE-2023-45132","title":"IgnoreIP/IgnoreCIDR should not trust X-Forwarded-For","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.\n","status":"published","published":"2023-10-11T20:21:26.313Z","modified":"2026-10-28T10:36:25.681335815Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","level":"critical"}],"cwes":["CWE-693"],"updated_at":"2026-11-02T15:44:33.792101Z"}]}}