CVE-2026-16536

Simple Google Calendar Outlook Events Widget < 3.1.0 - Unauthenticated SSRF via calendar_id

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

Simple Google Calendar Outlook Events Widget

CVSS v3.1 CNA

5.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS

0.32% chance of exploitation in the next 30 days, 24th percentile

Published

2026-08-04

Proof-of-concept exploits (1)

• https://wpscan.com/vulnerability/effa5549-ecfa-45ba-9044-7345d674c2ca/

References

• CVE Record
• NVD entry