---
id: CVE-2026-109937
title: Otter Blocks < 3.2.3 - Unauthenticated Open Redirect via Stripe Checkout Block
summary: >-
  The Otter Blocks  WordPress plugin before 3.2.3 does not validate that a
  user-supplied return URL belongs to the site before using it to build the
  return destination of a Stripe Checkout session, allowing unauthenticated
  attackers to red…
severity: medium
cvss: 5.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N'
cvssSource: adp
cwe:
  - CWE-601
product: Otter Blocks
affected:
  - otter_blocks < 3.2.3
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-18T10:58:37.704515Z'
published: '2026-10-18'
updated: '2026-10-18'
sourceUpdated: '2026-10-18T11:12:31.318Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-109937'
references:
  - url: 'https://wpscan.com/vulnerability/9765313d-c879-457f-851f-dab74b8d90a0/'
tags:
  - cve.org
ingestedAt: '2026-10-18T06:38:27.436Z'
epss: 0.00146
epssPercentile: 0.03767
---

## Overview

The Otter Blocks  WordPress plugin before 3.2.3 does not validate that a user-supplied return URL belongs to the site before using it to build the return destination of a Stripe Checkout session, allowing unauthenticated attackers to redirect victims who complete or cancel checkout to an arbitrary external URL.

## Affected

- `otter_blocks < 3.2.3`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.