VDB
DEBIAN-CVE-2025-12543
DEBIAN-CVE-2025-12543
PUBLISHED
CVSS 9.600000381469727 CRITICAL
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 Scores
CVSS 3.1
9.600000381469727
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Debian:14 | undertow | 0, 1.3.11-1, 1.3.16-1 |
Exploit Intelligence
- kavin71725/CVE-2025-12543-Fix-for-Wildfly (github-poc-repo)
- kavin71725/CVE-2025-12543-Fix-for-Wildfly (github-poc)
- index.html (github-poc)
- Server.java (github-poc)
Timeline
- Jan 7, 2026 CVE Published
- Apr 28, 2026 CVE Updated