CVE-2024-12451
HTML5 chat <= 1.07 - Authenticated (Contributor+) Stored Cross-Site Scripting
CVSS Score
6.4
EPSS Score
0.0%
EPSS Percentile
0th
The HTML5 chat plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'HTML5CHAT' shortcode in all versions up to, and including, 1.07 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
| CWE | CWE-79 |
| Vendor | proxymis |
| Product | html5 chat |
| Published | Jan 30, 2025 |
| Last Updated | Apr 8, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
proxymis / HTML5 Chat
0 ≤ 1.07
References
wordfence.com: https://www.wordfence.com/threat-intel/vulnerabilities/id/98de0a50-8464-4ea6-bf55-add9aab2d716?source=cve plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/html5-chat/trunk/index.php#L159 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/changeset/3443134/
Credits
Peter Thaleikis