CVE-2026-39971
Gravedad CVSS v3.1:
ALTA
Tipo:
CWE-113
Neutralización incorrecta de secuencias CRLF en cabeceras HTTP (División de respuesta HTTP)
Fecha de publicación:
15/04/2026
Última modificación:
23/04/2026
Descripción
*** Pendiente de traducción *** Serendipity is a PHP-powered weblog engine. In versions 2.6-beta2 and below, the email sending functionality in include/functions.inc.php inserts $_SERVER['HTTP_HOST'] directly into the Message-ID SMTP header without validation, and the existing sanitization function serendipity_isResponseClean() is not called on HTTP_HOST before embedding it. An attacker who can control the Host header during an email-triggering action such as comment notifications or subscription emails can inject arbitrary SMTP headers into outgoing emails. This enables identity spoofing, reply hijacking via manipulated Message-ID threading, and email reputation abuse through the attacker's domain being embedded in legitimate mail headers. This issue has been fixed in version 2.6.0.
Impacto
Puntuación base 3.x
7.20
Gravedad 3.x
ALTA
Productos y versiones vulnerables
| CPE | Desde | Hasta |
|---|---|---|
| cpe:2.3:a:s9y:serendipity:*:*:*:*:*:*:*:* | 2.6.0 (excluyendo) | |
| cpe:2.3:a:s9y:serendipity:2.6.0:beta1:*:*:*:*:*:* |
Para consultar la lista completa de nombres de CPE con productos y versiones, ver esta página



