CVE-2025-27110— Libmodsecurity3 has possible bypass of encoded HTML entities
Quick assessment
Affected
owasp-modsecurity ModSecurity
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
ModSecurity是OWASP ModSecurity开源的一个开源、跨平台的web应用程序防火墙（WAF）引擎。 ModSecurity 3.0.13版本存在安全漏洞，该漏洞源于无法解码包含前导零的编码HTML实体。
Possible ATT&CK Techniques 1 AI
T1550 · Use Alternate Authentication Material
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I. Basic Information for CVE-2025-27110
Vulnerability Information
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Vulnerability Title
Libmodsecurity3 has possible bypass of encoded HTML entities
Source: CVE Program / CVE List V5
Vulnerability Description
Libmodsecurity is one component of the ModSecurity v3 project. The library codebase serves as an interface to ModSecurity Connectors taking in web traffic and applying traditional ModSecurity processing. A bug that exists only in Libmodsecurity3 version 3.0.13 means that, in 3.0.13, Libmodsecurity3 can't decode encoded HTML entities if they contains leading zeroes. Version 3.0.14 contains a fix. No known workarounds are available.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H
Source: CVE Program / CVE List V5
Vulnerability Type
编码错误
Source: CVE Program / CVE List V5
Vulnerability Title
ModSecurity 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
ModSecurity是OWASP ModSecurity开源的一个开源、跨平台的web应用程序防火墙（WAF）引擎。 ModSecurity 3.0.13版本存在安全漏洞，该漏洞源于无法解码包含前导零的编码HTML实体。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| owasp-modsecurity | ModSecurity | = 3.0.13 | - |
|
II. Public POCs for CVE-2025-27110
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2025-27110 (1)
News Coverage for CVE-2025-27110 (1)
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V. Comments for CVE-2025-27110
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