CVE-2026-93756: Smash Balloon Social Post Feed <= 4.13.0 - Unauthenticated Stored Cross-Site Scripting via Facebook Comment Message in Admin Builder Preview

Vulnerability summary

CVE-2026-93756 is a high (CVSS 7.2) Cross-site Scripting vulnerability in smub smash balloon social post feed – simple social feeds for wordpress. EPSS estimates a 0.27% chance of exploitation in the next 30 days, higher than 17.8% of scored vulnerabilities. Fixed in 4.14.0.

Timeline

1. 02-10-2026
   PublishedVulnerability first disclosed.
2. 03-10-2026
   Last modifiedVulnerability information updated.

Description

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.

• CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.