VDB
CISA-2025-49812
CISA-2025-49812
PUBLISHED
CVSS 7.4 HIGH
Reported by apache · Published July 10, 2025
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.
Risk Scores
CVSS 3.1
7.4
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Apache Software Foundation | Apache HTTP Server | 0 |
| Apache Software Foundation | Apache HTTP Server | 0, 0 |
Timeline
- Jul 10, 2025 CVE Published
- Nov 4, 2025 CVE Updated