CVE-2020-10964: s9y Serendipity

Critical severity, CVSS 9.8. EPSS: 2.8% chance of exploitation in the next 30 days.

Serendipity before 2.3.4 on Windows allows remote attackers to execute arbitrary code because the filename of a renamed file may end with a dot. This file may then be renamed to have a .php filename.

Affected products

• s9y Serendipity: before 2.3.4 (fixed in 2.3.4)

Published 2020-03-25. Last modified 2026-06-17.