CVE-2026-107751 json
Mang Board <= 2.4.3 - Unauthenticated Stored Cross-Site Scripting via 'user_name' Parameter
published 26d ago modified 25d ago also EUVD-2026-100907
- cvss
- 7.2
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 25%
- public exploits
- 0
- none known
Summary
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.
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Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 25d ago
Exploit prediction
0.32% chance of exploitation in the next 30 days, higher than 25% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.2 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N |
Affected products
- kitae-park Mang Board
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/72650c92-918a-4486-9365-11bcb6b6741a?source=cve
- plugins.trac.wordpress.org /browser/mangboard/tags/2.4.3/templates/tpl.button.php#L75
- plugins.trac.wordpress.org /browser/mangboard/tags/2.4.3/includes/skin-filters.php#L50
- plugins.trac.wordpress.org /browser/mangboard/tags/2.4.3/includes/functions/func.api.php#L146
- plugins.trac.wordpress.org /browser/mangboard/tags/2.4.3/api/mb-board.php#L24
- plugins.trac.wordpress.org /browser/mangboard/tags/2.4.3/includes/mb-actions.php#L520
- wordpress.org /plugins/mangboard/
- plugins.trac.wordpress.org /changeset/3738898/mangboard/trunk/templates/tpl.button.php
Sources
- CVE List CVE-2026-107751
- NVD CVE-2026-107751
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.