CVE-2026-8420
BLOGCHAT Chat System <= 1.3.6.3 - Cross-Site Request Forgery to Stored Cross-Site Scripting via Settings Update
CVSS Score
6.1
EPSS Score
0.0%
EPSS Percentile
5th
The BLOGCHAT Chat System plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 1.3.6.3. This is due to missing or incorrect nonce validation on a function. This makes it possible for unauthenticated attackers to update settings and inject malicious web scripts via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.
| CWE | CWE-352 |
| Vendor | rdbeach |
| Product | blogchat chat system |
| Published | May 20, 2026 |
| Last Updated | May 20, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
rdbeach / BLOGCHAT Chat System
0 ≤ 1.3.6.3
References
wordfence.com: https://www.wordfence.com/threat-intel/vulnerabilities/id/a62186aa-19aa-445b-8fdc-b029bdafd58f?source=cve plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/blogchat-chat-system/trunk/wp-blogchat-widget.php#L208 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/blogchat-chat-system/tags/1.3.6.3/wp-blogchat-widget.php#L208 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/blogchat-chat-system/trunk/wp-blogchat-widget.php#L215 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/blogchat-chat-system/tags/1.3.6.3/wp-blogchat-widget.php#L215 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/blogchat-chat-system/trunk/wp-blogchat-widget.php#L222 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/blogchat-chat-system/tags/1.3.6.3/wp-blogchat-widget.php#L222 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/blogchat-chat-system/trunk/wp-blogchat-widget.php#L293 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/blogchat-chat-system/tags/1.3.6.3/wp-blogchat-widget.php#L293
Credits
Muhammad Nur Ibnu Hubab