ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. In versions 2.9.11 and below, an attacker can override the HTTP response’s Content-Type, which could lead to several issues depending on the HTTP scenario. For example, we have demonstrated the potential for XSS and arbitrary script source code disclosure in the latest version of mod_security2. This issue is fixed in version 2.9.12.
CVSS Details
- CVSS 4.0 Base Score: 6.9 (MEDIUM)
- CVSS 4.0 Vector: (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X)
- CVSS 3.1 Base Score: 6.1
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade mod_security-debuginfoUpgrade mod_security-mlogcUpgrade mod_security | May 20, 2026 | May 20, 2026 |
| Amazon_linux_2023 | amazon-linux-2023-upgrade-mod-securityamazon-linux-2023-upgrade-mod-security-debuginfoamazon-linux-2023-upgrade-mod-security-debugsourceamazon-linux-2023-upgrade-mod-security-mlogcamazon-linux-2023-upgrade-mod-security-mlogc-debuginfo | Sep 9, 2025 | Aug 5, 2025 | |
| Debian | — | Upgrade modsecurity-apache | Sep 8, 2025 | Sep 8, 2025 |
| Redhat_linux | no-fix-redhat-rpm-package | Jul 17, 2026 | Aug 5, 2025 | |
| Suse | — | suse-upgrade-apache2-mod_security2 | Dec 5, 2025 | Sep 29, 2025 |
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