CVE-2023-25690: Apache HTTP Server: HTTP request splitting with mod_rewrite and mod_proxy

Overview

Severity

Critical (CVSS 9.8)

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit Status

Not Exploited

Patch Tuesday

2023-Mar

Released

2023-03-14

Last Updated

2025-05-15

EPSS Score

68.18% (percentile: 98.6%)

FAQ

Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability? One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the most recent and most secure versions of the open source libraries with which the distro is composed. Microsoft is committed to transparency in this work which is why we began publishing CSAF/VEX in October 2025. See this blog post for more information. If impact to additional products is identified, we will update the CVE to reflect this.

Detection & Weaponization (1 sources)

Maturity: Exploit

• GitHub PoC: 5 repositories

Affected Products (3)

Other

• 17931-16820
• 17932-16823
• 17683-17084

Revision History

• 2023-03-14: Information published.
• 2025-05-15: Added mod_http2 to Azure Linux 3.0 Added httpd to CBL-Mariner 1.0 Added httpd to CBL-Mariner 2.0