CVE-2026-16536: Unknown Simple Google Calendar Outlook Events Widget

Medium severity, CVSS 5.3. EPSS: 0.3% chance of exploitation in the next 30 days.

The Simple Google Calendar Outlook Events Widget WordPress plugin before 3.1.0 does not validate a user-supplied URL before performing a server-side request, allowing unauthenticated attackers to perform Server-Side Request Forgery attacks and, in some cases, read the response of the internal request.

Affected products

• Unknown Simple Google Calendar Outlook Events Widget: before 3.1.0 (fixed in 3.1.0)

Published 2026-08-04. Last modified 2026-08-26.