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CVE-2024-38473

HighPublished

Apache HTTP Server proxy encoding problem

Published: Jul 1, 2024
Updated: Feb 13, 2025
Assigning CNA: apache
Evidence observed: Aug 8, 2026

Primary CVSS

8.1/ 10High

nvd · CVSS 3.1

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

EPSS probability estimate

25.9%

Moderate · next 30 days

Percentile: 97.9%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

Encoding problem in mod_proxy in Apache HTTP Server 2.4.59 and earlier allows request URLs with incorrect encoding to be sent to backend services, potentially bypassing authentication via crafted requests. Users are recommended to upgrade to version 2.4.60, which fixes this issue.

Sources

CVE-2024-38473PoC
Proof-of-concept demonstrating an encoding flaw in Apache HTTP Server mod_proxy that can bypass authentication via crafted encoded URLs.
CVE-2024-38473-Nuclei-TemplateScanner
Nuclei template to detect Apache servers vulnerable to CVE-2024-38473
apache-vulnerability-testingPoC
Apache HTTP Server Vulnerability Testing Tool | PoC for CVE-2024-38472 , CVE-2024-39573 , CVE-2024-38477 , CVE-2024-38476 , CVE-2024-38475 , CVE-2024-38474 , CVE-2024-38473 , CVE-2023-38709

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