CVE-2024-38475

CVE-2024-38475: Apache HTTP Server weakness in mod_rewrite when first segment of substitution matches filesystem path.

Vendor Apache Software Foundation

Product Apache HTTP Server

Weakness CWE-116

KEV Status Known Exploited

Published July 1, 2024

Last update November 3, 2025

View on NVD All CVEs

CVSS base score

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What the vulnerability does

01Description

Improper escaping of output in mod_rewrite in Apache HTTP Server 2.4.59 and earlier 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. Substitutions in server context that use a backreferences or variables as the first segment of the substitution are affected. Some unsafe RewiteRules will be broken by this change and the rewrite flag "UnsafePrefixStat" can be used to opt back in once ensuring the substitution is appropriately constrained.

CISA mandated remediation

02CISA 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.

Key dates

03Disclosure timeline

July 1, 2024 CVE published

November 3, 2025 Record updated

External resources

04References

NVD — National Vulnerability Database https://nvd.nist.gov/vuln/detail/CVE-2024-38475 CWE — Common Weakness Enumeration https://cwe.mitre.org/data/definitions/116.html AskarLabs — CWE-116 write-up Improper Encoding or Escaping of Output CISA KEV Reference https://httpd.apache.org/security/vulnerabilities_24.html CISA KEV Reference https://nvd.nist.gov/vuln/detail/CVE-2024-38475

Related vulnerabilities

CVE-2024-38475: Apache HTTP Server weakness in mod_rewrite when first segment of substitution matches filesystem path.

01Description

02CISA Required Action

03Disclosure timeline

04References

05Related CVE