CVE-2026-3506 WP-Chatbot for Messenger <= 4.9 - Missing Authorization to Unauthenticated Chatbot Configuration Takeover
Unauthenticated attackers can overwrite chatbot configuration options to hijack visitor conversations, affecting WordPress sites using this plugin.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-3506?
CVE-2026-3506 is a medium-severity missing authorization vulnerability in larrykim WP-Chatbot for Messenger, published on 21 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The WP-Chatbot for Messenger plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 4.9. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for unauthenticated attackers to overwrite the site's MobileMonkey API token and company ID options, which can be used to hijack chatbot configuration and redirect visitor conversations to an attacker-controlled MobileMonkey account.
Weakness: CWE-862
Which versions are affected by CVE-2026-3506?
How do I fix CVE-2026-3506?
No fix has been published for CVE-2026-3506 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-3506 being exploited?
There is no known exploitation of CVE-2026-3506 in the wild and no public exploit code.
Sources
Also known as GHSA-28gh-r3vv-g85j.