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CVE-2024-38475: Apache HTTP Server Improper Escaping of Output Vulnerability

criticalknown exploitedpublic exploitCVE-2024-38475
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
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.

CSIRTS triage

vendor: Apacheproduct: Apache HTTP ServerRemote code executionInformation disclosure
What
The vulnerability allows an attacker to map URLs to filesystem locations, potentially leading to code execution or source code disclosure.
Who is affected
Deployments of Apache HTTP Server using mod_rewrite are affected.
Urgency
Remediation is critical due to active exploitation and the severity of the vulnerability.
Action
Upgrade to the patched version of Apache HTTP Server.

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Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2025-05-01
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2024-38475

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2024-38475coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for Apache HTTP Server

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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