PT-2025-27643 · Unknown · Modsecurity

Redxanadu · Published 2025-07-01 · Updated 2025-08-08 · CVE-2025-52891

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions: ModSecurity versions 2.9.8 through 2.9.10

Description: The issue occurs when an empty XML tag is encountered, causing a segmentation fault. This happens if SecParseXmlIntoArgs is set to On or OnlyArgs, the request type is application/xml, and at least one XML tag is empty.

Recommendations: For versions 2.9.8 through 2.9.10, update to version 2.9.11 to resolve the issue. As a temporary workaround for versions 2.9.8 through 2.9.10, consider setting SecParseXmlIntoArgs to Off.

Exploit

Fix

DoS

RCE

Weakness Enumeration

CWE-20

Related Identifiers

BDU:2026-00351

BIT-MODSECURITY-2025-52891

BIT-MODSECURITY2-2025-52891

CVE-2025-52891

GHSA-GW9C-4WFM-VJ3X

OESA-2025-1750

OESA-2025-1751

OESA-2025-1752

OESA-2025-1753

OESA-2025-1754

OESA-2025-1755

OPENSUSE-SU-2025:15313-1

Affected Products

Modsecurity

References · 34

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/52xxx/CVE-2025-52891.json · Exploit
• https://osv.dev/vulnerability/UBUNTU-CVE-2025-52891 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2025-52891 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2025-52891 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2025-48866 · Security Note
• https://osv.dev/vulnerability/OESA-2025-1751 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-52891 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2025:15313-1 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2025-1754 · Vendor Advisory
• https://osv.dev/vulnerability/BIT-modsecurity2-2025-52891 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2025-1753 · Vendor Advisory
• https://osv.dev/vulnerability/BIT-modsecurity-2025-52891 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2025-1752 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2025-52891 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-52891 · Security Note