CVE-2025-49812
Apache HTTP Server mod_ssl TLS Desynchronisation Hijack Vulnerability
Description
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.
INFO
Published Date :
July 10, 2025, 5:15 p.m.
Last Modified :
July 10, 2025, 5:15 p.m.
Source :
[email protected]
Remotely Exploitable :
No
Impact Score :
Exploitability Score :
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2025-49812.
| URL | Resource |
|---|---|
| https://httpd.apache.org/security/vulnerabilities_24.html |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-49812 vulnerability anywhere in the article.
-
CybersecurityNews
Apache HTTP Server 2.4.64 Released With Patch for 8 Vulnerabilities
The Apache Software Foundation has released Apache HTTP Server version 2.4.64, addressing eight critical security vulnerabilities that affected versions spanning from 2.4.0 through 2.4.63. This latest ... Read more
The following table lists the changes that have been made to the
CVE-2025-49812 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by [email protected]
Jul. 10, 2025
Action Type Old Value New Value Added Description 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. Added CWE CWE-287 Added Reference https://httpd.apache.org/security/vulnerabilities_24.html
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-49812 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2025-49812
weaknesses.