---
title: "Mang Board WordPress Plugin - Stored XSS"
description: "Mang Board WordPress plugin <= 2.4.3 contains a stored XSS caused by insufficient sanitization and escaping of the 'content' parameter in wp_ajax_nopriv_mb_template endpoint, letting unauthenticated attackers inject scripts executed by users, exploit requires public access to the endpoint without authentication."
url: https://panop.io/threat-heartbeat/CVE-2026-109998/
---

# CVE-2026-109998 Mang Board WordPress Plugin - Stored XSS

Mang Board WordPress plugin <= 2.4.3 contains a stored XSS caused by insufficient sanitization and escaping of the 'content' parameter in wp\_ajax\_nopriv\_mb\_template endpoint, letting unauthenticated attackers inject scripts executed by users, exploit requires public access to the endpoint without authentication.

CVSS base score 7.2 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-109998)

## Details

Type

Stored Xss

Impact

Stored Xss

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

Published

16 October 2026

Updated

16 October 2026

Weakness

[CWE-79](https://cwe.mitre.org/data/definitions/79.html)

## Vendor fix

Update to a version later than 2.4.3 or apply vendor patches.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-109998](https://nvd.nist.gov/vuln/detail/CVE-2026-109998)
- [https://plugins.trac.wordpress.org/changeset?reponame=&old=3738899%40mangboard&new=3738899%40mangboard](https://plugins.trac.wordpress.org/changeset?reponame=&old=3738899%40mangboard&new=3738899%40mangboard)
- [https://www.wordfence.com/threat-intel/vulnerabilities/id/9fe455dc-8138-49d0-97a1-b0dce111d23b?source=cve](https://www.wordfence.com/threat-intel/vulnerabilities/id/9fe455dc-8138-49d0-97a1-b0dce111d23b?source=cve)
- [https://plugins.trac.wordpress.org/browser/mangboard/tags/2.4.3/api/mb-board.php#L24](https://plugins.trac.wordpress.org/browser/mangboard/tags/2.4.3/api/mb-board.php#L24)
- [https://plugins.trac.wordpress.org/browser/mangboard/tags/2.4.3/api/mb-template.php#L150](https://plugins.trac.wordpress.org/browser/mangboard/tags/2.4.3/api/mb-template.php#L150)
- [https://plugins.trac.wordpress.org/browser/mangboard/tags/2.4.3/api/mb-template.php#L177](https://plugins.trac.wordpress.org/browser/mangboard/tags/2.4.3/api/mb-template.php#L177)
- [https://plugins.trac.wordpress.org/browser/mangboard/tags/2.4.3/includes/functions/func.api.php#L146](https://plugins.trac.wordpress.org/browser/mangboard/tags/2.4.3/includes/functions/func.api.php#L146)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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