CVE-2024-43204

Apache HTTP Server: SSRF with mod_headers setting Content-Type header

Published Jul 10, 2025 CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
Description
SSRF in Apache HTTP Server with mod_proxy loaded allows an attacker to send outbound proxy requests to a URL controlled by the attacker.  Requires an unlikely configuration where mod_headers is configured to modify the Content-Type request or response header with a value provided in the HTTP request.

Users are recommended to upgrade to version 2.4.64 which fixes this issue.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DLA Debian DLA DLA-4270-1 apache2 security update
EUVD EUVD EUVD-2024-54774 SSRF in Apache HTTP Server with mod_proxy loaded allows an attacker to send outbound proxy requests to a URL controlled by the attacker.  Requires an unlikely configuration where mod_headers is configured to modify the Content-Type request or response header with a value provided in the HTTP request. Users are recommended to upgrade to version 2.4.64 which fixes this issue.
Ubuntu USN Ubuntu USN USN-7639-1 Apache HTTP Server vulnerabilities
Ubuntu USN Ubuntu USN USN-7639-2 Apache HTTP Server vulnerabilities
Ubuntu USN Ubuntu USN USN-8338-1 Apache HTTP Server vulnerabilities
History
Type Values Removed Values Added
CPEs cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*
Type Values Removed Values Added
Metrics epss

{'score': 0.00017}

epss

{'score': 0.00037}

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N'}

Type Values Removed Values Added
References
Metrics threat_severity

None

cvssV3_1

{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N'}

threat_severity

Moderate

Type Values Removed Values Added
Metrics epss

{'score': 0.00017}

Type Values Removed Values Added
Description SSRF in Apache HTTP Server with mod_proxy loaded allows an attacker to send outbound proxy requests to a URL controlled by the attacker.  Requires an unlikely configuration where mod_headers is configured to modify the Content-Type request or response header with a value provided in the HTTP request. Users are recommended to upgrade to version 2.4.64 which fixes this issue.
Title Apache HTTP Server: SSRF with mod_headers setting Content-Type header
Weaknesses CWE-918
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
apache
Published
Updated
Nov 4, 2025, 9:08 PM
Reserved
Aug 8, 2024, 3:13 PM
Status
Modified
Published
Jul 10, 2025, 5:15 PM
Modified
Jun 17, 2026, 7:50 AM
Severity
Moderate
Public date
Jul 14, 2025, 7:14 AM