CVE-2025-12543

CriticalCVSS 9.6/10Last modified Nov 4, 2026

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.

Metrics

CVSS 3.1 9.6/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Weakness enumeration

CWE-20

Affected software

VendorProductVersions
Red HatRed Hat build of Apache Camel 4.14.4 for Spring Boot 3.5.11—
Red HatRed Hat JBoss Enterprise Application Platform 7.1 EUS for RHEL 7—
Red HatRed Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 7—
Red HatRed Hat JBoss Enterprise Application Platform 7.4.24—
Red HatRed Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7—
Red HatRed Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7—
Red HatRed Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 8—
Red HatRed Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 8—
Red HatRed Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 9—
Red HatRed Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 9—
Red HatRed Hat JBoss Enterprise Application Platform 8.0—
Red HatRed Hat JBoss Enterprise Application Platform 8.0 for RHEL 8—
Red HatRed Hat JBoss Enterprise Application Platform 8.0 for RHEL 8—
Red HatRed Hat JBoss Enterprise Application Platform 8.0 for RHEL 8—
Red HatRed Hat JBoss Enterprise Application Platform 8.0 for RHEL 8—
Red HatRed Hat JBoss Enterprise Application Platform 8.0 for RHEL 8—
Red HatRed Hat JBoss Enterprise Application Platform 8.0 for RHEL 8—
Red HatRed Hat JBoss Enterprise Application Platform 8.0 for RHEL 9—
Red HatRed Hat JBoss Enterprise Application Platform 8.0 for RHEL 9—
Red HatRed Hat JBoss Enterprise Application Platform 8.0 for RHEL 9—
Red HatRed Hat JBoss Enterprise Application Platform 8.0 for RHEL 9—
Red HatRed Hat JBoss Enterprise Application Platform 8.0 for RHEL 9—
Red HatRed Hat JBoss Enterprise Application Platform 8.0 for RHEL 9—
Red HatRed Hat JBoss Enterprise Application Platform 8.1.3—
Red HatRed Hat JBoss Enterprise Application Platform 8.1 for RHEL 8—
Red HatRed Hat JBoss Enterprise Application Platform 8.1 for RHEL 8—
Red HatRed Hat JBoss Enterprise Application Platform 8.1 for RHEL 8—
Red HatRed Hat JBoss Enterprise Application Platform 8.1 for RHEL 8—
Red HatRed Hat JBoss Enterprise Application Platform 8.1 for RHEL 8—
Red HatRed Hat JBoss Enterprise Application Platform 8.1 for RHEL 8—
Red HatRed Hat JBoss Enterprise Application Platform 8.1 for RHEL 8—
Red HatRed Hat JBoss Enterprise Application Platform 8.1 for RHEL 8—
Red HatRed Hat JBoss Enterprise Application Platform 8.1 for RHEL 8—
Red HatRed Hat JBoss Enterprise Application Platform 8.1 for RHEL 8—
Red HatRed Hat JBoss Enterprise Application Platform 8.1 for RHEL 8—
Red HatRed Hat JBoss Enterprise Application Platform 8.1 for RHEL 8—
Red HatRed Hat JBoss Enterprise Application Platform 8.1 for RHEL 9—
Red HatRed Hat JBoss Enterprise Application Platform 8.1 for RHEL 9—
Red HatRed Hat JBoss Enterprise Application Platform 8.1 for RHEL 9—
Red HatRed Hat JBoss Enterprise Application Platform 8.1 for RHEL 9—
Red HatRed Hat JBoss Enterprise Application Platform 8.1 for RHEL 9—
Red HatRed Hat JBoss Enterprise Application Platform 8.1 for RHEL 9—
Red HatRed Hat JBoss Enterprise Application Platform 8.1 for RHEL 9—
Red HatRed Hat JBoss Enterprise Application Platform 8.1 for RHEL 9—
Red HatRed Hat JBoss Enterprise Application Platform 8.1 for RHEL 9—
Red HatRed Hat JBoss Enterprise Application Platform 8.1 for RHEL 9—
Red HatRed Hat JBoss Enterprise Application Platform 8.1 for RHEL 9—
Red HatRed Hat JBoss Enterprise Application Platform 8.1 for RHEL 9—
Red HatRed Hat Single Sign-On 7.6.13—
Red HatRed Hat Single Sign-On 7.6 for RHEL 7—

References

Timeline

Published
Jan 7, 2026
Last modified
Nov 4, 2026
NVD status
Modified

Related CVEs from 2025

CVE-2025-125444.8The Publisher portal fails to enforce proper validation on uploaded SVG files, allowing users with the Publisher role to inject malicious scCVE-2025-125455.3The Pixel Manager for WooCommerce – Track Conversions and Analytics, Google Ads, TikTok and more plugin for WordPress is vulnerable to InforCVE-2025-125465.4A vulnerability was determined in LogicalDOC Community Edition up to 9.2.1. This affects an unknown part of the component API Key creation UCVE-2025-125478.1A vulnerability was identified in LogicalDOC Community Edition up to 9.2.1. This vulnerability affects unknown code of the file /login.jsp oCVE-2025-125489.0A flaw was found in Eclipse Che che-machine-exec. This vulnerability allows unauthenticated remote arbitrary command execution and secret exCVE-2025-125498.1Improper Control of Filename for Include/Require Statement in PHP Program ('PHP Remote File Inclusion') vulnerability in magentech Rozy - FlCVE-2025-12559.1Untrusted Pointer Dereference vulnerability in RTI Connext Professional (Core Libraries) allows Pointer Manipulation. This issue affects ConCVE-2025-125508.1Improper Control of Filename for Include/Require Statement in PHP Program ('PHP Remote File Inclusion') vulnerability in jwsthemes OchaHouseCVE-2025-125517.1Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in e-plugins ListingHub listinghub allowsCVE-2025-125529.8Insufficient Password Policy.This issue affects BLU-IC2: through 1.19.5; BLU-IC4: through 1.19.5.CVE-2025-125539.8Email Server Certificate Verification Disabled.This issue affects BLU-IC2: through 1.19.5; BLU-IC4: through 1.19.5.CVE-2025-125549.8Missing Security Headers.This issue affects BLU-IC2: through 1.19.5; BLU-IC4: through 1.19.5.
CVE-2025-12543: Critical severity, CVSS 9.6 | Vulnix