CVSS base score
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
What the vulnerability does
The Upcoming for Calendly plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 1.2.4. This is due to missing nonce validation on the settings update functionality. This makes it possible for unauthenticated attackers to update the plugin's Calendly API key via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.
Explanation of Vulnerability in Simple Terms
Upcoming for Calendly versions up to 1.2.4 contain a cross-site request forgery (CSRF) vulnerability. An attacker can craft a malicious webpage that, when visited by a logged-in user, performs unwanted actions on their behalf within the application. The vulnerability requires user interaction and does not expose sensitive data, but can modify application state.
What an attacker can do
Perform unwanted actions on behalf of a logged-in user by tricking them into visiting a malicious webpage.
Potential impact on your site
Users' Calendly settings or data could be modified without their knowledge if they visit a malicious link while logged in.
Conditions required to exploit
User must be logged in and visit an attacker-controlled webpage or link.
Key dates
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