Server-Side Request Forgery Vulnerability in Simple Google Calendar Outlook Events Widget by WordPress
CVE-2026-16536

Currently unrated

Key Information:

Vendor

WordPress
Status
Simple Google Calendar Outlook Events Widget
Vendor
CVE Published:
4 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-16536?

The Simple Google Calendar Outlook Events Widget plugin for WordPress prior to version 3.1.0 is prone to a security vulnerability due to improper validation of user-supplied URLs. This oversight allows unauthenticated attackers to execute Server-Side Request Forgery (SSRF) attacks, which may enable them to send unauthorized requests and potentially read the responses from internal resources. It is recommended to update to the latest version to mitigate these risks.

Affected Version(s)

Simple Google Calendar Outlook Events Widget 0 < 3.1.0

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-16536 - Proof of Concept

References

https://wpscan.com/vulnerability/effa5549-ecfa-45ba-9044-...
exploitvdb-entrytechnical-description

Timeline

  • 🟡

    Public PoC available

  • đź‘ľ

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Pablo González Pérez
Francisco José Ramírez Vicente and Iñigo Sánchez Enciso
WPScan
.