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Vulnerability details: VCID-varh-ysfr-euc8
Vulnerability ID VCID-varh-ysfr-euc8
Aliases CVE-2025-66200
Summary mod_userdir+suexec bypass via AllowOverride FileInfo vulnerability in Apache HTTP Server. Users with access to use the RequestHeader directive in htaccess can cause some CGI scripts to run under an unexpected userid. This issue affects Apache HTTP Server: from 2.4.7 through 2.4.65. Users are recommended to upgrade to version 2.4.66, which fixes the issue.
Status Published
Exploitability 0.5
Weighted Severity 4.9
Risk 2.5
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-305 Authentication Bypass by Primary Weakness
System Score Found at
cvssv3 5.4 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2025-66200.json
epss 0.00055 https://api.first.org/data/v1/epss?cve=CVE-2025-66200
epss 0.00055 https://api.first.org/data/v1/epss?cve=CVE-2025-66200
epss 0.0007 https://api.first.org/data/v1/epss?cve=CVE-2025-66200
epss 0.0007 https://api.first.org/data/v1/epss?cve=CVE-2025-66200
epss 0.0007 https://api.first.org/data/v1/epss?cve=CVE-2025-66200
epss 0.0007 https://api.first.org/data/v1/epss?cve=CVE-2025-66200
epss 0.0007 https://api.first.org/data/v1/epss?cve=CVE-2025-66200
epss 0.0007 https://api.first.org/data/v1/epss?cve=CVE-2025-66200
cvssv3.1 6.2 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv3.1 5.4 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-2025-66200.json
https://api.first.org/data/v1/epss?cve=CVE-2025-66200
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-66200
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
1121926 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1121926
2419262 https://bugzilla.redhat.com/show_bug.cgi?id=2419262
CVE-2025-66200 https://httpd.apache.org/security/json/CVE-2025-66200.json
RHSA-2025:23732 https://access.redhat.com/errata/RHSA-2025:23732
RHSA-2025:23919 https://access.redhat.com/errata/RHSA-2025:23919
RHSA-2025:23932 https://access.redhat.com/errata/RHSA-2025:23932
RHSA-2026:2994 https://access.redhat.com/errata/RHSA-2026:2994
RHSA-2026:2995 https://access.redhat.com/errata/RHSA-2026:2995
USN-7968-1 https://usn.ubuntu.com/7968-1/
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2025-66200.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:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N 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:L/PR:L/UI:N/S:U/C:N/I:L/A:L 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:P/P:M/B:A/M:M/D:T/2025-12-05T17:38:10Z/ Found at https://httpd.apache.org/security/vulnerabilities_24.html
Exploit Prediction Scoring System (EPSS)
Percentile 0.17472
EPSS Score 0.00055
Published At April 2, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-04-01T12:36:23.834482+00:00 Apache HTTPD Importer Import https://httpd.apache.org/security/json/CVE-2025-66200.json 38.0.0