CVE-2024-12451

HTML5 chat <= 1.07 - Authenticated (Contributor+) Stored Cross-Site Scripting

Published Jan 30, 2025 CVSS 3.1 · 6.4 Medium EPSS < 1% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

Source ID Title
EUVD EUVD EUVD-2024-50868 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, 1.04 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.
History
Type Values Removed Values Added
Description 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, 1.04 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. 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.
Title HTML5 chat <= 1.04 - Authenticated (Contributor+) Stored Cross-Site Scripting HTML5 chat <= 1.07 - Authenticated (Contributor+) Stored Cross-Site Scripting
References
Type Values Removed Values Added
First Time appeared Proxymis
Proxymis html5 Chat
CPEs cpe:2.3:a:proxymis:html5_chat:*:*:*:*:*:wordpress:*:*
Vendors & Products Proxymis
Proxymis html5 Chat
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description 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, 1.04 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.
Title HTML5 chat <= 1.04 - Authenticated (Contributor+) Stored Cross-Site Scripting
Weaknesses CWE-79
References
Metrics cvssV3_1

{'score': 6.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Wordfence
Published
Updated
Apr 8, 2026, 5:10 PM
Reserved
Dec 10, 2024, 7:22 PM
Status
Modified
Published
Jan 30, 2025, 2:15 PM
Modified
Jun 17, 2026, 6:59 AM