🛡️ CVE-2022-39958
🟠 CVSS 7.5 — High ✅ No Known Exploit CWE-863 NVD
7.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

The OWASP ModSecurity Core Rule Set (CRS) is affected by a response body bypass to sequentially exfiltrate small and undetectable sections of data by repeatedly submitting an HTTP Range header field with a small byte range. A restricted resource, access to which would ordinarily be detected, may be exfiltrated from the backend, despite being protected by a web application firewall that uses CRS. Short subsections of a restricted resource may bypass pattern matching techniques and allow undetected access. The legacy CRS versions 3.0.x and 3.1.x are affected, as well as the currently supported versions 3.2.1 and 3.3.2. Integrators and users are advised to upgrade to 3.2.2 and 3.3.3 respectively and to configure a CRS paranoia level of 3 or higher.

Details

Severity HIGH
CVSS Score 7.5
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CWE CWE-863
Public Exploit ✅ No
Source NVD
Published 2022-09-20
Updated 2026-06-08
Modified 2025-11-03

Affected Packages

Software From version Fixed in
debian-linux — —
fedora — —
owasp-modsecurity-core-rule-set 3.3.0 3.3.3

References

Similar Threats

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