In some mod_ssl configurations on Apache HTTP Server versions through to 2.4.63, an HTTP desynchronisation attack allows a man-in-the-middle attacker to hijack an HTTP session via a TLS upgrade.
Only configurations using "SSLEngine optional" to enable TLS upgrades are affected. Users are recommended to upgrade to version 2.4.64, which removes support for TLS upgrade.
CVSS
No CVSS.
References
| Link | Resource |
|---|---|
| https://httpd.apache.org/security/vulnerabilities_24.html | Vendor Advisory |
Configurations
History
29 Jul 2025, 15:09
| Type | Values Removed | Values Added |
|---|---|---|
| CPE | cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:* | |
| References | () https://httpd.apache.org/security/vulnerabilities_24.html - Vendor Advisory | |
| First Time |
Apache http Server
Apache |
15 Jul 2025, 20:15
| Type | Values Removed | Values Added |
|---|---|---|
| CWE |
10 Jul 2025, 17:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2025-07-10 17:15
Updated : 2025-07-29 15:09
NVD link : CVE-2025-49812
Mitre link : CVE-2025-49812
JSON object : View
Products Affected
apache
- http_server
CWE
No CWE.