CVE-2026-16775
Received Received - Intake

Stored XSS in Smash Balloon Social Post Feed WordPress Plugin

Publication date: 2026-08-16

Last updated on: 2026-08-16

Assigner: Wordfence

Description
The Smash Balloon Social Post Feed – Simple Social Feeds for WordPress plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'id' Shortcode Attribute in all versions up to, and including, 4.9.0 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

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Meta Information

Published
2026-08-16
Last Modified
2026-08-16
Generated
2026-08-16
AI Q&A
2026-08-16
EPSS Evaluated
N/A
NVD
CVE-2026-16775
EUVD
EUVD-2026-59901

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
smash_balloon social_post_feed to 4.9.0 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-79 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.

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Executive Summary

This vulnerability is a Stored Cross-Site Scripting (XSS) issue in the Smash Balloon Social Post Feed WordPress plugin. It allows authenticated attackers with contributor-level access or higher to inject malicious scripts into web pages via the 'id' shortcode attribute. The flaw exists due to insufficient input sanitization and output escaping in versions up to 4.9.0.

Detection Guidance

To detect this vulnerability, inspect WordPress sites using the Smash Balloon Social Post Feed plugin versions up to 4.9.0. Check for unauthorized scripts in pages or posts, particularly those using the 'id' shortcode attribute. Review user roles with contributor access or higher for suspicious activity.

Impact Analysis

An attacker could exploit this to inject scripts that steal user sessions, redirect to malicious sites, or perform actions on behalf of users. Visitors to affected pages may have their data compromised or be exposed to further attacks. The impact depends on the privileges of the injected script.

Compliance Impact

This vulnerability could lead to data breaches, violating GDPR's data protection requirements or HIPAA's safeguards for protected health information. Organizations may face fines or penalties for failing to protect user data from such exploits.

Mitigation Strategies
  • Update the Smash Balloon Social Post Feed plugin to the latest version beyond 4.9.0.
  • Remove or restrict contributor-level access to only trusted users.
  • Scan WordPress sites for injected scripts in posts or pages.
  • Review server logs for unusual activity related to the plugin.

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