CVE-2025-27110

mod_security: Libmodsecurity3 has possible bypass of encoded HTML entities

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Severity

Important

Red Hat Product Security

8.6

CVSS 3.1

Review impact separately from score.

Published · February 26, 2025

Updated · November 2, 2026

Description

A flaw was found in the ibmodsecurity3 component of the ModSecurity project. Due to an error in handling encoding, ModSecurity cannot decode HTML entities if they contain leading zeroes. This issue may allow malicious payloads to pass through security filters in configurations relying on ModSecurity for web traffic processing.

Statement

This vulnerability exists in one specific version of libmodsecurity3 (v3.0.13). Red Hat does not ship an affected version in any products.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 8.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L

CWE-172 · Improper Encoding or Decoding of Data