CVE-2026-8420
Cross-Site Request Forgery in BLOGCHAT Chat System WordPress Plugin
Publication date: 2026-05-20
Last updated on: 2026-05-20
Assigner: Wordfence
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| blogchat | chat_system | to 1.3.6.3 (inc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-352 | The web application does not, or cannot, sufficiently verify whether a request was intentionally provided by the user who sent the request, which could have originated from an unauthorized actor. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
The BLOGCHAT Chat System plugin for WordPress has a vulnerability known as Cross-Site Request Forgery (CSRF) in all versions up to and including 1.3.6.3. This occurs because the plugin lacks proper nonce validation on a function, which is a security measure to verify the authenticity of requests.
As a result, an attacker who is not authenticated can trick a site administrator into performing an action, such as clicking on a malicious link, which then allows the attacker to update settings or inject malicious web scripts on the site.
How can this vulnerability impact me? :
This vulnerability can allow an unauthenticated attacker to change the settings of the BLOGCHAT Chat System plugin or inject malicious scripts into the website by tricking an administrator into executing a forged request.
Such actions can lead to compromised site integrity, potential defacement, unauthorized changes, or the execution of malicious code that could affect site visitors or administrators.