Apache · HTTP Server
CVE-2024-38475
Apache HTTP Server Improper Escaping of Output Vulnerability
CISA KEV record
- CISA date added
- 2025-05-01
- CISA due date
- 2025-05-22
- Known ransomware use
- Unknown
NVD risk context
9.1 CRITICAL
CVSS is a technical severity score. CISA’s KEV status remains the evidence that this vulnerability is known to be exploited.
Description
Apache HTTP Server contains an improper escaping of output vulnerability in mod_rewrite that allows an attacker to map URLs to filesystem locations that are permitted to be served by the server but are not intentionally/directly reachable by any URL, resulting in code execution or source code disclosure.
Required action
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
NVD reference index
Vendor and remediation references
NVD has tagged these sources as vendor advisories, patches, mitigations, or release notes.
- https://httpd.apache.org/security/vulnerabilities_24.html ↗
- https://github.com/apache/httpd/commit/9a6157d1e2f7ab15963020381054b48782bc18cf ↗
Other NVD references (5)
- https://security.netapp.com/advisory/ntap-20240712-0001/ ↗
- http://www.openwall.com/lists/oss-security/2024/07/01/8 ↗
- https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2024-0018 ↗
- https://www.blackhat.com/us-24/briefings/schedule/index.html#confusion-attacks-exploiting-hidden-semantic-ambiguity-in-apache-http-server-pre-recorded-40227 ↗
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-38475 ↗
MITRE CWE context
CWE classification
The product prepares a structured message for communication with another component, but encoding or escaping of the data is either missing or done incorrectly. As a result, the intended structure of the message is not preserved.
View official MITRE CWE details ↗NVD record timing
NVD record timeline
These dates describe NVD’s record, not CISA’s KEV addition or remediation due date.
- NVD published
- Jul 01, 2024, 07:15 PM UTC When NVD first published this CVE record.
- NVD last updated
- Jun 17, 2026, 07:40 AM UTC When NVD last changed its analysis or record data.
Advanced: view the technical CVSS vector
This standardized code is intended for security tools and technical analysts. The plain-language risk summary above explains its main points.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CISA notes
This vulnerability affects a common open-source component, third-party library, or a protocol used by different products. Please check with specific vendors for information on patching status. For more information, please see: https://httpd.apache.org/security/vulnerabilities_24.html ; https://nvd.nist.gov/vuln/detail/CVE-2024-38475