CVE-2011-1133: s9y Serendipity

Medium severity, CVSS 6.1. EPSS: 1.8% chance of exploitation in the next 30 days.

Cross-Site Scripting (XSS) in Xinha, as included in the Serendipity package before 1.5.5, allows remote attackers to execute arbitrary code via plugins/ExtendedFileManager/backend.php.

Affected products

• s9y Serendipity: before 1.5.5 (fixed in 1.5.5)

Published 2019-11-05. Last modified 2026-06-16.