CVE-2024-38474
Apache HTTP Server weakness with encoded question marks in backreferences
- Published
- Jul 1, 2024
- Updated
- Mar 25, 2025
- Assigning CNA
- apache
- Evidence observed
- Aug 8, 2026
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HLow · next 30 days
- Percentile
- 83.6%
- 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
Substitution encoding issue in mod_rewrite in Apache HTTP Server 2.4.59 and earlier allows attacker to execute scripts in directories permitted by the configuration but not directly reachable by any URL or source disclosure of scripts meant to only to be executed as CGI. Users are recommended to upgrade to version 2.4.60, which fixes this issue. Some RewriteRules that capture and substitute unsafely will now fail unless rewrite flag "UnsafeAllow3F" is specified.
Sources
1Apache 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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