CVE-2021-42654: Sscms Siteserver CMS

Critical severity, CVSS 9.8. EPSS: 1.7% chance of exploitation in the next 30 days.

SiteServer CMS < V5.1 is affected by an unrestricted upload of a file with dangerous type (getshell), which could be used to execute arbitrary code.

Affected products

• Sscms Siteserver CMS: before 5.1 (fixed in 5.1)

Published 2022-05-24. Last modified 2026-06-17.