# CVE-2026-93756: Smash Balloon Social Post Feed stored XSS via Facebook comments

Source: https://junglewise.ai/threats/cve-2026-93756-the-smash-balloon-social-post-feed-simple-social-feeds-for  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-02. Updated: 2026-10-05  
License: CC BY 4.0 with a link back

CVE-2026-93756 · Severity: high · CVSS 7.2 · Published 2026-10-02

The Smash Balloon Social Post Feed WordPress plugin displays Facebook comments in an admin builder preview page without properly sanitizing user-supplied content. An attacker with a Facebook account can inject malicious scripts into comments on a connected Facebook page; when a WordPress administrator visits the builder preview, the injected script executes with the administrator's privileges. This could allow the attacker to install malicious plugins, leading to server compromise and data theft.

Vendors: [Smash Balloon](https://junglewise.ai/threats/vendors/smash-balloon).

## Quick answers

**Is CVE-2026-93756 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-93756 being exploited in the wild.

**How severe is CVE-2026-93756?** High severity, with a CVSS score of 7.2, published 2 October 2026.

**Which products and versions are affected?** Smash Balloon Social Post Feed up to and including 4.13.0.

**Is there a fix for CVE-2026-93756?** Yes: fixed in 4.13.1. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-93756 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-93756?** Check whether you run Smash Balloon Social Post Feed at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in 4.13.1

## Technical details

The plugin fails to sanitize Facebook comment content before rendering it via v-html in the admin preview component, and uses v-show rather than v-if, causing injected HTML and event handlers to be evaluated in the DOM even when hidden. An unauthenticated attacker with a Facebook account can post a malicious comment; when an administrator previews the feed, arbitrary JavaScript executes in their session. Combined with a missing URL validation flaw in the cff_install_addon AJAX handler, an injected script can trigger arbitrary plugin installation from attacker-controlled servers, resulting in remote code execution.

## Affected products

- Smash Balloon Social Post Feed up to and including 4.13.0

## Timeline

- 2026-10-02: disclosed

## References

- [https://plugins.trac.wordpress.org/browser/custom-facebook-feed/tags/4.12.0/admin/addon-functions.php](https://plugins.trac.wordpress.org/browser/custom-facebook-feed/tags/4.12.0/admin/addon-functions.php)
- [https://plugins.trac.wordpress.org/browser/custom-facebook-feed/tags/4.12.0/admin/builder/templates/preview/preview-components.php](https://plugins.trac.wordpress.org/browser/custom-facebook-feed/tags/4.12.0/admin/builder/templates/preview/preview-components.php)