CVE-2021-35368

CriticalCVSS 9.8/10Last modified Jun 17, 2026

Description

OWASP ModSecurity Core Rule Set 3.1.x before 3.1.2, 3.2.x before 3.2.1, and 3.3.x before 3.3.2 is affected by a Request Body Bypass via a trailing pathname.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected software

Vendor	Product	Versions
n/a	n/a	n/a

References

https://coreruleset.org/20210630/cve-2021-35368-crs-request-body-bypass/Exploit, Release Notes, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2023/01/msg00033.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6MS5GMNYHFFIBWLJW7N3XAD24SLF3PFZ/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IVYUJOKHDEXFTM2CZMEESJ6TZSPVNSSZ/
https://owasp.org/www-project-modsecurity-core-rule-set/Vendor Advisory
https://portswigger.net/daily-swig/lessons-learned-how-a-severe-vulnerability-in-the-owasp-modsecurity-core-rule-set-sparked-much-needed-changeExploit, Third Party Advisory
https://portswigger.net/daily-swig/waf-bypass-severe-owasp-modsecurity-core-rule-set-bug-was-present-for-several-yearsExploit, Third Party Advisory
https://security.gentoo.org/glsa/202305-25
https://coreruleset.org/20210630/cve-2021-35368-crs-request-body-bypass/Exploit, Release Notes, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2023/01/msg00033.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6MS5GMNYHFFIBWLJW7N3XAD24SLF3PFZ/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IVYUJOKHDEXFTM2CZMEESJ6TZSPVNSSZ/
https://owasp.org/www-project-modsecurity-core-rule-set/Vendor Advisory
https://portswigger.net/daily-swig/lessons-learned-how-a-severe-vulnerability-in-the-owasp-modsecurity-core-rule-set-sparked-much-needed-changeExploit, Third Party Advisory
https://portswigger.net/daily-swig/waf-bypass-severe-owasp-modsecurity-core-rule-set-bug-was-present-for-several-yearsExploit, Third Party Advisory
https://security.gentoo.org/glsa/202305-25

Timeline

Published: Nov 5, 2021
Last modified: Jun 17, 2026
NVD status: Modified

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