CVE-2020-35313: Wondercms

Critical severity, CVSS 9.8. EPSS: 45.2% chance of exploitation in the next 30 days.

A server-side request forgery (SSRF) vulnerability in the addCustomThemePluginRepository function in index.php in WonderCMS 3.1.3 allows remote attackers to execute arbitrary code via a crafted URL to the theme/plugin installer.

Affected products

• Wondercms Wondercms: version 3.1.3 only

Published 2021-04-20. Last modified 2026-06-17.