The HTTP Headers plugin for WordPress is vulnerable to CRLF Injection in all versions up to, and including, 1.19.2. This is due to insufficient sanitization of custom header name and value fields before writing them to the Apache .htaccess file via `insert_with_markers()`. This makes it possible for authenticated attackers, with Administrator-level access and above, to inject arbitrary newline characters and additional Apache directives into the .htaccess configuration file via the 'Custom Headers' settings, leading to Apache configuration parse errors and potential site-wide denial of service.
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History
Wed, 22 Apr 2026 19:15:00 +0000
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ssvc
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Wed, 22 Apr 2026 12:15:00 +0000
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Wordpress
Wordpress wordpress Zinoui Zinoui http Headers |
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Wordpress
Wordpress wordpress Zinoui Zinoui http Headers |
Wed, 22 Apr 2026 08:30:00 +0000
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| Description | The HTTP Headers plugin for WordPress is vulnerable to CRLF Injection in all versions up to, and including, 1.19.2. This is due to insufficient sanitization of custom header name and value fields before writing them to the Apache .htaccess file via `insert_with_markers()`. This makes it possible for authenticated attackers, with Administrator-level access and above, to inject arbitrary newline characters and additional Apache directives into the .htaccess configuration file via the 'Custom Headers' settings, leading to Apache configuration parse errors and potential site-wide denial of service. | |
| Title | HTTP Headers <= 1.19.2 - Authenticated (Administrator+) CRLF Injection via Custom Header Values | |
| Weaknesses | CWE-93 | |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: Wordfence
Published: 2026-04-22T07:45:37.169Z
Updated: 2026-04-22T18:29:28.392Z
Reserved: 2026-02-18T21:00:50.620Z
Link: CVE-2026-2717
Updated: 2026-04-22T18:29:12.898Z
Status : Deferred
Published: 2026-04-22T09:16:20.987
Modified: 2026-04-22T20:22:50.570
Link: CVE-2026-2717
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