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.
CVE-2026-2717 is a medium severity with CVSS 5.5 Vulnerability issue affecting the Plugin HTTP Headers. It affects Versions up to 1.19.2 and is listed without a confirmed patched release.
CVE-2026-2717 is tracked for the Plugin HTTP Headers as medium severity with CVSS 5.5. The affected range is Versions up to 1.19.2. No fixed release is listed in this feed entry, so operators should monitor the vendor and reference links before accepting the risk.
| Software Type | Plugin |
|---|---|
| Software Slug |
http-headers
View on wordpress.org
|
| CVE | CVE-2026-2717 |
| Patched Versions |
No patched versions published.
|
| Affected Versions |
Versions up to 1.19.2
|
These internal links group the same WordPress plugin by CVE, issue type, severity, and patch status so operators and search engines can connect the full vulnerability cluster.
HTTP Headers <= 1.19.2 - Authenticated (Administrator+) External Control of File Name or Path to RCE via 'hh_htpasswd_path' and 'hh_www_authenticate_user' Parameters
HTTP Headers <= 1.18.10 - Authenticated(Administrator+) Remote Code Execution
HTTP Headers <= 1.18.8 - Authenticated(Administrator+) SQL Injection
HTTP Headers <= 1.18.11 - Server-Side Request Forgery
HTTP Headers <= 1.19.2 - Authenticated (Administrator+) Stored Cross-Site Scripting via 'Custom Headers' Plugin Setting
HTTP Headers <= 1.18.11 - Authenticated (Administrator+) Stored Cross-Site Scripting
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