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CVE-2024-38475

Exploitation: active CVSS 9.1 CRITICAL

CVSS base score: 9.1 (Critical) CISA · v3.1

Score assigned by CISA's Vulnrichment program; the vendor's CVE record did not include one.

Apache HTTP Server Improper Escaping of Output Vulnerability

Vendor: Apache   Product: HTTP Server

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.

Lifecycle Timeline

Each milestone comes from a different source, so gaps between them are gaps in what those sources publish, not evidence that nothing happened. EPSS history for this CVE holds 128 points from 2024-07-06, tracked daily from 2026-09-09; earlier points are weekly, which dates a spike to within a week. Peak probability 100.0% on 2026-06-20.

Published Applicability

Red Hat CSAF/VEX 0 affected · 749 fixed · 18 not affected
OSV.dev (incl. GHSA) 5 affected · 5 fixed · 0 not affected
CVE List v5 (CNA container) 1 affected · 0 fixed · 0 not affected
CVE List v5 (ADP/Vulnrichment) 2 affected · 0 fixed · 0 not affected

Check whether a specific version is affected →

What each source publishes about which product versions carry this vulnerability, kept as written rather than merged. Absence here means no source has published applicability data, not that nothing is affected.

Research & News Coverage

No mentions found in monitored research blogs or news feeds.

Detection & Exploitation

Exploit / Pen Test
Host / SIEM
none published

Coverage across public collections only: Nuclei and OpenVAS NVT (scan); Snort and Suricata ET Open (network); Sigma and YARA (host/SIEM); Metasploit, Exploit-DB and public GitHub repositories (exploit). Absence here means nothing public was found, not that detection is impossible.
GitHub PoC repositories are collected automatically by PoC-in-GitHub (CC0) and are not vetted: some are fakes and some are malware. Treat them as evidence that code was published, not as code to run.
OpenVAS coverage derives from the Greenbone Community Feed, made available under the Open Database License (ODbL) v1.0; its individual Vulnerability Tests are licensed GNU GPL v2.

Distribution Status

Debian · apache2 bookworm 2.4.61-1~deb12u1 trixie 2.4.60-1 forky 2.4.60-1 sid 2.4.60-1 scope: local

Where the distribution has shipped a fix, and in which version. Green means the release has resolved it, amber that it is still open. Data from the Debian Security Tracker, used under Debian's MIT / GPLv2+ terms. Debian is upstream of several other distributions, so a fix here often precedes theirs.

CISA Assessment (Vulnrichment / SSVC)

active
yes
total
9.1 CRITICAL
—
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CWE-116 — Improper Encoding or Escaping of Output
2024-07-05

KEV Catalog Status

2025-05-01
2025-05-22
Unknown

Listed By

SourceDateRecord
CISA Vulnrichment 2024-07-05 source record →
CISA KEV 2025-05-01 source record →

Weaponization Timeline — Offensive & Testing Tools

No exploit-tool sightings recorded for this CVE.

Evidence tiers are explained on the About page — a merged Metasploit module is far stronger evidence than a distro package mention.

External References