Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| s9y / Serendipity | affected < 2.6.0 |
CWE
CWE-113
References
- https://github.com/s9y/Serendipity/security/advisories/GHSA-458g-q4fh-mj6r
- https://github.com/s9y/Serendipity/releases/tag/2.6.0
ADP enrichment
No English description supplied.
No references supplied.