Improper URL Validation in Otter Blocks WordPress Plugin
CVE-2026-109937

Currently unrated

Key Information:

Vendor

WordPress
Status
Otter Blocks
Vendor
CVE Published:
18 October 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-109937?

The Otter Blocks plugin for WordPress fails to properly validate user-supplied return URLs before utilizing them in the Stripe Checkout session process. This flaw permits unauthenticated attackers to exploit the functionality, potentially redirecting users to arbitrary external sites upon completion or cancellation of a checkout. Such vulnerabilities can lead to phishing attacks or other malicious activities aimed at unsuspecting users.

Affected Version(s)

Otter Blocks 0 < 3.2.3

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-2026-109937 - Proof of Concept

References

https://wpscan.com/vulnerability/9765313d-c879-457f-851f-...
exploitvdb-entrytechnical-description

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

John Ryan Albon
WPScan
.