---
id: CVE-2026-93756
title: >-
  The Smash Balloon Social Post Feed – Simple Social Feeds for WordPress plugin
  for WordPress is vulnerable to Stored Cross-Site Scripting via Facebook
  Comment Message via v-html in Admin Builder Preview in all versions up to, and
  includin…
summary: >-
  The Smash Balloon Social Post Feed – Simple Social Feeds for WordPress plugin
  for WordPress is vulnerable to Stored Cross-Site Scripting via Facebook
  Comment Message via v-html in Admin Builder Preview in all versions up to, and
  includin…
severity: high
cvss: 7.2
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N'
cwe:
  - CWE-79
vendor: smub
product: Smash Balloon Social Post Feed – Simple Social Feeds for WordPress
affected:
  - smash_balloon_social_post_feed_simple_social_feeds_for_wordpress <= 4.13.0
published: '2026-10-02'
updated: '2026-10-02'
sourceUpdated: '2026-10-02T13:18:55.613'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-93756'
references:
  - url: >-
      https://plugins.trac.wordpress.org/browser/custom-facebook-feed/tags/4.12.0/admin/addon-functions.php#L142
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/custom-facebook-feed/tags/4.12.0/admin/builder/templates/preview/preview-components.php#L142
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/custom-facebook-feed/tags/4.12.0/inc/Builder/CFF_Feed_Builder.php#L242
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/custom-facebook-feed/tags/4.12.0/inc/Builder/CFF_Feed_Builder.php#L805
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/custom-facebook-feed/tags/4.12.0/inc/Integrations/CFF_Graph_Url.php#L76
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/changeset/3720826/custom-facebook-feed/trunk/admin/builder/templates/preview/preview-components.php?old=3656491&old_path=custom-facebook-feed%2Ftrunk%2Fadmin%2Fbuilder%2Ftemplates%2Fpreview%2Fpreview-components.php
    label: security@wordfence.com
  - url: >-
      https://www.wordfence.com/threat-intel/vulnerabilities/id/a4a3bc4b-bc0c-47ac-9f60-e05b300311b4?source=cve
    label: security@wordfence.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-10-02T08:14:06.225Z'
---

## Overview

The Smash Balloon Social Post Feed – Simple Social Feeds for WordPress plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Facebook Comment Message via v-html in Admin Builder Preview in all versions up to, and including, 4.13.0 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts that will execute whenever an administrator accesses the feed builder preview page. This attack requires only a Facebook account to post a comment on the connected Facebook Page, with no WordPress credentials needed; additionally, the use of v-show rather than v-if means injected HTML — including onerror handlers — is evaluated in the DOM even when the comment section is not visually displayed. When combined with the lack of URL validation in the cff_install_addon AJAX handler (admin/addon-functions.php), an injected script running in an administrator's session can trigger arbitrary plugin installation from an attacker-controlled URL, which may result in server-side code execution.

## Remediation

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