CVE-2025-49812

HIGHNVD 7.47.4—
EchelonGraph scoreMEDIUM confidence

Score 7.4 from GitHub Security Advisory (severity: HIGH) published 2025-07-10. NVD baseline CVSS 7.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.4
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 7.4Exploit: NoneExposed: 0

A fix is available — apply it.

In some mod_ssl configurations on Apache HTTP Server versions through to 2.4.63, an HTTP desynchronisation attack allows a man-in-the-middle attacker to hijack an HTTP session via a TLS upgrade.

Only configurations using "SSLEngine optional" to enable TLS upgrades are affected. Users are recommended to upgrade to version 2.4.64, which removes support for TLS upgrade.

CVSS v3
7.4
EG Score
7.4(medium)
EG Risk
34(Track)
EG Risk 34/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity74% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
40.8%
KEV
Not listed

Published

July 10, 2025

Last Modified

November 4, 2025

References (5)

Vendor Advisories for CVE-2025-49812(3)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(18)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuapache2-utils (2.4.63-1ubuntu1.1) @ plucky2026-05-30ubuntu
ubuntulibapache2-mod-proxy-html (1:2.4.7-1ubuntu4.22+esm12) @ trusty2026-05-30ubuntu
ubuntuapache2-utils (2.4.18-2ubuntu3.17+esm16) @ xenial2026-05-30ubuntu
redhathttpd:2.4-8040020250827161824.522a0ee42025-09-11redhat
redhathttpd:2.4-8060020250827162806.ad008a3a2025-09-11redhat
redhathttpd:2.4-8080020250827163339.63b345852025-09-10redhat
redhathttpd:2.4-8020020250827160659.4cda2c842025-09-08redhat
redhathttpd:2.4-8100020250728150834.489197e62025-09-03redhat
redhathttpd-0:2.4.6-90.el7_7.62025-09-02redhat
redhathttpd-0:2.4.6-99.el7_9.62025-09-02redhat
redhathttpd-0:2.2.15-71.el6_10.12025-09-02redhat
redhathttpd-0:2.4.63-1.el10_0.22025-09-02redhat
redhathttpd-0:2.4.62-4.el9_6.42025-09-02redhat
redhathttpd-0:2.4.57-11.el9_4.32025-08-28redhat
redhathttpd-0:2.4.53-11.el9_2.132025-08-28redhat
redhathttpd-0:2.4.51-7.el9_0.102025-08-28redhat
redhatpatch2025-08-14redhat
redhatjbcs-httpd24-mod_security-0:2.9.6-11.el7jbcs2025-08-14redhat

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.

Additional Vendor Advisories

(16)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 12× in last 7d / 50× 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. 2026-07-23 02:57 UTCEG score recompute
  2. 2026-07-22 14:07 UTCEPSS rescore
  3. 2026-07-22 14:07 UTCEPSS rescore
  4. 2026-07-21 15:24 UTCEPSS rescore
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  1. 2026-07-07 13:45 UTCEPSS rescore
  2. 2026-07-06 19:13 UTCOSV refresh
  3. 2026-07-06 16:27 UTCEPSS rescore
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  5. 2026-07-06 02:23 UTCEPSS rescore
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  36. 2026-06-18 07:35 UTCOSV refresh
  37. 2026-06-17 17:52 UTCEPSS rescore
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  49. 2026-06-10 13:22 UTCEPSS rescore
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  52. 2026-06-07 15:24 UTCEPSS rescore
  53. 2026-06-06 13:47 UTCEPSS rescore
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  67. 2026-05-30 02:04 UTCEG score recompute
  68. 2026-05-30 02:04 UTCVendor advisory
  69. 2026-05-30 02:04 UTCGHSA enrichment
  70. 2026-05-29 13:44 UTCEPSS rescore

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2025-49812?
CVE-2025-49812 is a high vulnerability published on July 10, 2025. In some mod_ssl configurations on Apache HTTP Server versions through to 2.4.63, an HTTP desynchronisation attack allows a man-in-the-middle attacker to hijack an HTTP session via a TLS upgrade. Only configurations using "SSLEngine optional" to enable TLS upgrades are affected. Users are…
When was CVE-2025-49812 disclosed?
CVE-2025-49812 was first published in the National Vulnerability Database on July 10, 2025, with the most recent update on November 4, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-49812 actively exploited?
CVE-2025-49812 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 40.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2025-49812?
CVE-2025-49812 has a CVSS v3 base score of 7.4 (NVD).
How do I remediate CVE-2025-49812?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-49812, 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

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