CVE-2018-18841: Sem-CMS Semcms

Medium severity, CVSS 4.8. EPSS: 0.5% chance of exploitation in the next 30 days.

XSS was discovered in SEMCMS PHP V3.4 via the SEMCMS_SeoAndTag.php?Class=edit&CF=SeoAndTag tag_indexkey parameter.

Affected products

• Sem-CMS Semcms: version 3.4 only

Published 2018-10-30. Last modified 2026-06-17.