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Vulnerability details: VCID-q672-pm8a-2yhm
Vulnerability ID VCID-q672-pm8a-2yhm
Aliases CVE-2025-49812
Summary 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.
Status Published
Exploitability 0.5
Weighted Severity 6.8
Risk 3.4
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-287 Improper Authentication
System Score Found at
cvssv3 7.5 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2025-49812.json
epss 0.00075 https://api.first.org/data/v1/epss?cve=CVE-2025-49812
epss 0.00075 https://api.first.org/data/v1/epss?cve=CVE-2025-49812
epss 0.00075 https://api.first.org/data/v1/epss?cve=CVE-2025-49812
epss 0.00075 https://api.first.org/data/v1/epss?cve=CVE-2025-49812
epss 0.00075 https://api.first.org/data/v1/epss?cve=CVE-2025-49812
epss 0.00075 https://api.first.org/data/v1/epss?cve=CVE-2025-49812
epss 0.00075 https://api.first.org/data/v1/epss?cve=CVE-2025-49812
epss 0.00075 https://api.first.org/data/v1/epss?cve=CVE-2025-49812
epss 0.00075 https://api.first.org/data/v1/epss?cve=CVE-2025-49812
epss 0.00075 https://api.first.org/data/v1/epss?cve=CVE-2025-49812
epss 0.00075 https://api.first.org/data/v1/epss?cve=CVE-2025-49812
epss 0.00075 https://api.first.org/data/v1/epss?cve=CVE-2025-49812
epss 0.00084 https://api.first.org/data/v1/epss?cve=CVE-2025-49812
epss 0.00084 https://api.first.org/data/v1/epss?cve=CVE-2025-49812
epss 0.00084 https://api.first.org/data/v1/epss?cve=CVE-2025-49812
epss 0.00084 https://api.first.org/data/v1/epss?cve=CVE-2025-49812
epss 0.00084 https://api.first.org/data/v1/epss?cve=CVE-2025-49812
epss 0.001 https://api.first.org/data/v1/epss?cve=CVE-2025-49812
cvssv3.1 7 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv3.1 7.4 https://httpd.apache.org/security/vulnerabilities_24.html
ssvc Track https://httpd.apache.org/security/vulnerabilities_24.html
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2025-49812.json
https://api.first.org/data/v1/epss?cve=CVE-2025-49812
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-49812
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://httpd.apache.org/security/vulnerabilities_24.html
2374580 https://bugzilla.redhat.com/show_bug.cgi?id=2374580
cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*
CVE-2025-49812 https://httpd.apache.org/security/json/CVE-2025-49812.json
CVE-2025-49812 https://nvd.nist.gov/vuln/detail/CVE-2025-49812
RHSA-2025:13680 https://access.redhat.com/errata/RHSA-2025:13680
RHSA-2025:13681 https://access.redhat.com/errata/RHSA-2025:13681
USN-7639-1 https://usn.ubuntu.com/7639-1/
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2025-49812.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:L Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N Found at https://httpd.apache.org/security/vulnerabilities_24.html
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:N/T:T/P:M/B:A/M:M/D:T/2025-07-11T16:05:54Z/ Found at https://httpd.apache.org/security/vulnerabilities_24.html
Exploit Prediction Scoring System (EPSS)
Percentile 0.23322
EPSS Score 0.00075
Published At July 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:29:10.130264+00:00 Apache HTTPD Importer Import https://httpd.apache.org/security/json/CVE-2025-49812.json 37.0.0