CVE-2023-25690

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2023-03-07. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this weekWeaponized
9.8
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • 660 internet-exposed hosts are running an affected version right now
  • High exploitation likelihood — EPSS 84%
CISA-KEV: Not listedEPSS: 84%CVSS: 9.8Exploit: NoneExposed: 660

A fix is available — apply it.

Some mod_proxy configurations on Apache HTTP Server versions 2.4.0 through 2.4.55 allow a HTTP Request Smuggling attack.

Configurations are affected when mod_proxy is enabled along with some form of RewriteRule or ProxyPassMatch in which a non-specific pattern matches some portion of the user-supplied request-target (URL) data and is then re-inserted into the proxied request-target using variable substitution. For example, something like:

RewriteEngine on RewriteRule "^/here/(.*)" "http://example.com:8080/elsewhere?$1"; [P] ProxyPassReverse /here/ http://example.com:8080/

Request splitting/smuggling could result in bypass of access controls in the proxy server, proxying unintended URLs to existing origin servers, and cache poisoning. Users are recommended to update to at least version 2.4.56 of Apache HTTP Server.

Live · internet exposure

660 internet-exposed hosts are running an affected version of CVE-2023-25690 right now.

across 61 countries (United States, Germany, Japan, France, United Kingdom)top: http_server
See the live KEV-Exposure radar →Found passively from public internet-scan data — aggregate, host-redacted.

EchelonGraph is the only CVE feed that fuses live vulnerability intelligence with its own live internet-exposure radar — so you see not just that a CVE is exploited, but how much of the internet is exposed to it right now.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
—
EPSS
99.7%
KEV
Not listed

Published

March 7, 2023

Last Modified

December 18, 2025

Advisory Details (3)

Auto-updated May 25, 2026
⚠️ Active exploitation confirmed. Patch available.
generic

Apache HTTPD: Multiple Vulnerabilities (GLSA 202309-01) — Gentoo security

https://security.gentoo.org/glsa/202309-01
generic Patch Available

[SECURITY] [DLA 3401-1] apache2 security update

https://lists.debian.org/debian-lts-announce/2023/04/msg00028.html
generic Patch Available🔴 Active Exploitation

Apache HTTP Server 2.4 vulnerabilities - The Apache HTTP Server Project

https://httpd.apache.org/security/vulnerabilities_24.html

Patch Availability(13)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuapache2-bin (2.4.54-2ubuntu1.2) @ kinetic2026-05-25ubuntu
ubuntuapache2-bin (2.4.18-2ubuntu3.17+esm10) @ xenial2026-05-25ubuntu
redhatjbcs-httpd24-httpd-0:2.4.51-39.el7jbcs2023-06-05redhat
redhathttpd2023-06-05redhat
redhathttpd24-httpd-0:2.4.34-23.el7.62023-05-24redhat
redhatmod_http2-0:1.15.19-3.el9_0.52023-04-20redhat
redhathttpd:2.4-8070020230328121648.bd1311ed2023-04-06redhat
redhathttpd:2.4-8020020230329005331.4cda2c842023-04-06redhat
redhatmod_http2-0:1.15.19-3.el9_1.52023-04-06redhat
redhathttpd:2.4-8040020230329004917.522a0ee42023-04-04redhat
redhathttpd:2.4-8060020230328221009.ad008a3a2023-04-04redhat
redhathttpd-0:2.4.6-98.el7_9.72023-04-04redhat
redhathttpd:2.4-8010020230329005620.c27ad7f82023-04-03redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

All Vendor Advisories

(14)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 6× in last 7d / 18× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-22 23:07 UTCEG score recompute
  2. 2026-07-22 14:06 UTCEPSS rescore
  3. 2026-07-20 17:05 UTCEPSS rescore
  4. 2026-07-16 17:01 UTCEPSS rescore
  5. 2026-07-16 17:01 UTCEPSS rescore
  6. 2026-07-16 04:23 UTCOSV refresh
  7. 2026-07-15 16:56 UTCEPSS rescore
  8. 2026-07-09 19:08 UTCEPSS rescore
  9. 2026-07-04 06:29 UTCEPSS rescore
  10. 2026-07-04 06:29 UTCEPSS rescore
  11. 2026-07-01 15:04 UTCEPSS rescore
  12. 2026-06-28 04:54 UTCEPSS rescore
  13. 2026-06-28 04:54 UTCEPSS rescore
  14. 2026-06-28 04:04 UTCOSV refresh
  15. 2026-06-25 13:48 UTCEPSS rescore
  16. 2026-06-25 13:48 UTCEPSS rescore
  17. 2026-06-23 21:31 UTCEPSS rescore
  18. 2026-06-23 21:31 UTCEPSS rescore
  19. 2026-06-21 14:55 UTCEPSS rescore
  20. 2026-06-21 14:55 UTCEPSS rescore
  21. 2026-06-21 01:58 UTCEPSS rescore
  22. 2026-06-21 01:58 UTCEPSS rescore
  23. 2026-06-16 17:51 UTCEPSS rescore
  24. 2026-06-16 17:51 UTCEPSS rescore
  25. 2026-06-16 17:51 UTCEPSS rescore
Show 31 more
  1. 2026-06-15 17:47 UTCEPSS rescore
  2. 2026-06-14 23:16 UTCEPSS rescore
  3. 2026-06-12 23:10 UTCEPSS rescore
  4. 2026-06-11 13:59 UTCEPSS rescore
  5. 2026-06-11 13:58 UTCEPSS rescore
  6. 2026-06-10 22:17 UTCEPSS rescore
  7. 2026-06-10 14:47 UTCOSV refresh
  8. 2026-06-10 13:21 UTCEPSS rescore
  9. 2026-06-10 13:21 UTCEPSS rescore
  10. 2026-06-05 22:46 UTCEPSS rescore
  11. 2026-06-05 22:46 UTCEPSS rescore
  12. 2026-06-05 22:46 UTCEPSS rescore
  13. 2026-06-05 06:09 UTCEPSS rescore
  14. 2026-06-05 06:09 UTCEPSS rescore
  15. 2026-06-04 13:11 UTCEPSS rescore
  16. 2026-06-04 13:11 UTCEPSS rescore
  17. 2026-06-02 20:12 UTCEPSS rescore
  18. 2026-06-02 20:12 UTCEPSS rescore
  19. 2026-06-02 20:12 UTCEPSS rescore
  20. 2026-06-01 13:51 UTCEPSS rescore
  21. 2026-06-01 13:50 UTCEPSS rescore
  22. 2026-05-31 22:29 UTCEPSS rescore
  23. 2026-05-31 22:29 UTCEPSS rescore
  24. 2026-05-31 22:29 UTCEPSS rescore
  25. 2026-05-31 00:15 UTCEPSS rescore
  26. 2026-05-31 00:15 UTCEPSS rescore
  27. 2026-05-27 13:39 UTCEPSS rescore
  28. 2026-05-25 05:40 UTCEG score recompute
  29. 2026-05-25 05:40 UTCVendor advisory
  30. 2026-05-25 05:40 UTCGHSA enrichment
  31. 2026-05-23 21:35 UTCOSV refresh

Publicly available exploits

(3 references)

Working exploit code is in the public domain (3 GitHub PoCs). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCoOCyginXOo/CVE-2023-25690-POC
    First seen Jun 1, 2025

    CVE 2023 25690 Proof of concept - mod_proxy vulnerable configuration on Apache HTTP Server versions 2.4.0 - 2.4.55 leads to HTTP Request Smuggling vulnerability.

    Open source ↗
  • GitHub PoCthanhlam-attt/CVE-2023-25690
    First seen Dec 4, 2023
    Open source ↗
  • GitHub PoCdhmosfunk/CVE-2023-25690-POC
    First seen May 22, 2023

    CVE 2023 25690 Proof of concept - mod_proxy vulnerable configuration on Apache HTTP Server versions 2.4.0 - 2.4.55 leads to HTTP Request Smuggling vulnerability.

    Open source ↗

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2023-25690?
CVE-2023-25690 is a critical vulnerability published on March 7, 2023. Some mod_proxy configurations on Apache HTTP Server versions 2.4.0 through 2.4.55 allow a HTTP Request Smuggling attack. Configurations are affected when mod_proxy is enabled along with some form of RewriteRule or ProxyPassMatch in which a non-specific pattern matches some portion of the…
When was CVE-2023-25690 disclosed?
CVE-2023-25690 was first published in the National Vulnerability Database on March 7, 2023, with the most recent update on December 18, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-25690 actively exploited?
CVE-2023-25690 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 99.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2023-25690?
CVE-2023-25690 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2023-25690?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-25690, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2023-25690

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