CVE-2026-107751
Mang Board <= 2.4.3 - Unauthenticated Stored Cross-Site Scripting via 'user_name' Parameter
- Published
- Updated
- Reserved
- Assigned by
- Wordfence
Description
The Mang Board plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'user_name' parameter in all versions up to, and including, 2.4.3 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The save-time sanitizer mbw_htmlspecialchars2() is ineffective against this vector because the exploit payload relies solely on unquoted HTML attribute syntax using only spaces, alphanumerics, and characters such as =, parentheses, and dots — none of which are escaped.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| WordfenceCNA (assigner) | 3.1 | High7.2 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N |
| NVDNVD · Deferred | 3.1 | High7.2 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N |
- EPSS (exploitation in 30 days)
- 0.32% · top 75% of all CVEs (5 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.2.
Weakness
Affected products
- affected ≤ 2.4.3
References (8)
- https://www.wordfence.com/threat-intel/vulnerabilities/id/72650c92-918a-4486-9365-11bcb6b6741a?source=cve (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/mangboard/tags/2.4.3/templates/tpl.button.php#L75 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/mangboard/tags/2.4.3/includes/skin-filters.php#L50 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/mangboard/tags/2.4.3/includes/functions/func.api.php#L146 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/mangboard/tags/2.4.3/api/mb-board.php#L24 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/mangboard/tags/2.4.3/includes/mb-actions.php#L520 (opens in a new tab)
- https://wordpress.org/plugins/mangboard/ (opens in a new tab)
- https://plugins.trac.wordpress.org/changeset/3738898/mangboard/trunk/templates/tpl.button.php (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-107751)Record last updated .