CVE-2025-12543
Description
A flaw was found in the Undertow HTTP server core, which is used in WildFly, JBoss EAP, and other Java applications. The Undertow library fails to properly validate the Host header in incoming HTTP requests.As a result, requests containing malformed or malicious Host headers are processed without rejection, enabling attackers to poison caches, perform internal network scans, or hijack user sessions.
Risk Information
Base Score
9.6
MODERATE
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:L
EPSS Score
Exploitation Probability
0.046
Associated Vulnerability
| Vulnerability | OS Platform |
|---|---|
| Multiple Vulnerabilities are affected in Red Hat JBoss Enterprise Application Platform 7 7.0.0 | Windows |
| Multiple Vulnerabilities are affected in Red Hat Data Grid 8 8.0 | Windows |
| Vulnerabilities CVE-2025-12543 are affected in Undertow-core 2.4.0 | Windows |
| Vulnerabilities CVE-2025-12543,CVE-2024-3884,CVE-2024-4027 are fixed in Undertow-core 2.3.21 | Windows |
| Vulnerabilities CVE-2025-12543,CVE-2024-3884,CVE-2024-4027 are fixed in Undertow-core 2.2.39 | Windows |
| Vulnerabilities CVE-2025-12543 are affected in Red Hat JBoss Enterprise Application Platform 7 8.0.11 | Windows |
| Vulnerabilities CVE-2025-12543 are affected in Red Hat JBoss Enterprise Application Platform 7 8.1.2 | Windows |
| Vulnerabilities CVE-2025-12543 are affected in Undertow-core for Linux 2.4.0 | Linux |
| Vulnerabilities CVE-2025-12543,CVE-2024-3884,CVE-2024-4027 are fixed in Undertow-core for Linux 2.3.21 | Linux |
| Vulnerabilities CVE-2025-12543,CVE-2024-3884,CVE-2024-4027 are fixed in Undertow-core for Linux 2.2.39 | Linux |
| Improper Input Validation Vulnerability (CVE-2025-12543) | NCM |
Patch Details
No records foundReferences
https://nvd.nist.gov/vuln/detail/CVE-2023-1234
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1234