Simple Google Calendar Outlook Events Widget <= 3.0.0 - Unauthenticated Server-Side Request Forgery
| CVE | CVE-2026-16536 |
|---|---|
| CVSS | 7.2 (High) |
| Publicly Published | July 25, 2026 |
| Last Updated | August 21, 2026 |
| Researchers |
Pablo González Pérez
Francisco José Ramírez Vicente Iñigo Sánchez Enciso |
Description
The Simple Google Calendar Outlook Events Widget plugin for WordPress is vulnerable to Server-Side Request Forgery in versions up to, and including, 3.0.0. This is due to missing whitelist validation on REST request parameters, allowing calendar_id to be passed directly as a block attribute and trigger arbitrary URL fetches. This makes it possible for unauthenticated attackers to make server-side HTTP requests to arbitrary locations by supplying a calendar_id parameter to the REST endpoint, causing the server to fetch attacker-controlled URLs.
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Vulnerability Details for Simple Google Calendar Outlook Events Widget
| Software Type | Plugin |
|---|---|
| Software Slug | simple-google-icalendar-widget (view on wordpress.org) |
| Patched? | Yes |
| Remediation | Update to version 3.1.0, or a newer patched version |
| Affected Version |
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| Patched Version |
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Recent vulnerabilities in Simple Google Calendar Outlook Events Widget
| # | Title | CVE ID | CVSS | Researchers | Date |
|---|---|---|---|---|---|
| 1 | Simple Google Calendar Outlook Events Block Widget <= 2.5.0 - Authenticated (Contributor+) Stored Cross-Site Scripting | CVE-2025-22497 | Peter Thaleikis | February 11, 2025 |
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