# Mang Board <= 2.4.4 - Unauthenticated Stored Cross-Site Scripting via Board Post Content

- **ID:** WPSEC-2026-0876
- **Plugin:** Mang Board (`mangboard`), https://wordpress.org/plugins/mangboard/
- **Affected versions:** all versions before 2.4.5
- **Fixed in:** 2.4.5 (Update to 2.4.5 or later.)
- **Severity:** High 7.2 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N)
- **Weakness:** CWE-79
- **Usage among sites WPSec scans:** plugin Low, affected versions None seen (as of 2026-10-14)
- **Attack surface analysis:** https://attacksurface.wpsec.com/plugin/mangboard
- **Fix released:** 2026-10-13
- **Published:** 2026-10-14
- **URL:** https://wpsec.com/vuln/WPSEC-2026-0876/

## Description

The Mang Board plugin for WordPress is vulnerable to Stored Cross-Site Scripting via board post content in all versions up to, and including, 2.4.4, due to insufficient input sanitization and output escaping. Content is only passed through the HTML purifier when the request includes an 'html' data_type, but posts already stored with the html data type are HTML-decoded on output without sanitization. This makes it possible for unauthenticated attackers, on boards that permit guest posting, to inject arbitrary web scripts in pages that will execute whenever a user accesses an affected page.

## References

- https://wpsec.com/vuln/WPSEC-2026-0876/
- https://plugins.svn.wordpress.org/mangboard/tags/2.4.5/
- https://wordpress.org/plugins/mangboard/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-0876/

License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Free to use, share and adapt, also commercially, if you credit WPSec and link to this advisory.