---
id: CVE-2026-4945
title: >-
  The Otter Blocks – Gutenberg Blocks, Page Builder for Gutenberg Editor & FSE
  plugin for WordPress is vulnerable to Insecure Direct Object Reference in all
  versions up to, and including, 3.1.7 via the 'watch_checkout' function due to
  miss…
summary: >-
  The Otter Blocks – Gutenberg Blocks, Page Builder for Gutenberg Editor & FSE
  plugin for WordPress is vulnerable to Insecure Direct Object Reference in all
  versions up to, and including, 3.1.7 via the 'watch_checkout' function due to
  miss…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N'
cwe:
  - CWE-639
vendor: themeisle
product: 'Otter Blocks – Gutenberg Blocks, Page Builder for Gutenberg Editor & FSE'
affected:
  - otter_blocks_gutenberg_blocks_page_builder_for_gutenberg_editor_fse <= 3.1.7
published: '2026-09-07'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T14:17:23.673'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-4945'
references:
  - url: >-
      https://plugins.trac.wordpress.org/browser/otter-blocks/trunk/inc/plugins/class-stripe-api.php#L234
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/otter-blocks/trunk/inc/plugins/class-stripe-api.php#L304
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/otter-blocks/trunk/inc/render/class-stripe-checkout-block.php#L69
    label: security@wordfence.com
  - url: 'https://plugins.trac.wordpress.org/changeset/3496611/'
    label: security@wordfence.com
  - url: >-
      https://www.wordfence.com/threat-intel/vulnerabilities/id/7ecb9f61-68d5-4c70-8d7d-e4fb067fcff9?source=cve
    label: security@wordfence.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-08T13:54:49.391981Z'
epss: 0.00298
epssPercentile: 0.22686
ingestedAt: '2026-09-08T15:33:26.977Z'
---

## Overview

The Otter Blocks – Gutenberg Blocks, Page Builder for Gutenberg Editor & FSE plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 3.1.7 via the 'watch_checkout' function due to missing validation on a user controlled key. This makes it possible for unauthenticated attackers to pay for a lower-cost product while obtaining entitlement for a premium product by manipulating the product_id parameter independently of the price_id parameter in the Stripe checkout URL.

## Remediation

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