Smash Balloon Social Post Feed <= 4.0 - Arbitrary Plugin Settings Update to Stored Cross-Site Scripting

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE CVE-2021-24918
CVSS 5.4 (Medium)
Publicly Published October 29, 2021
Last Updated January 23, 2023
Researcher Marc-Alexandre Montpas


The Smash Balloon Social Post Feed WordPress plugin before 4.0.1 did not have any privilege or nonce validation before saving the plugin's setting. As a result, any logged-in user on a vulnerable site could update the settings and store rogue JavaScript on each of its posts and pages.

Wordfence blocked 2,192 attacks targeting this vulnerability in the past 24 hours.



Vulnerability Details for Smash Balloon Social Post Feed – Simple Social Feeds for WordPress

Software Type Plugin
Software Slug custom-facebook-feed (view on
Patched? Yes
Remediation Update to version 4.0.1, or a newer patched version
Affected Version
  • < 4.0.1
Patched Version
  • 4.0.1

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