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 Newsletter Email Subscribe plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 2.4. This is due to incorrect nonce validation on the nels_settings_page function. This makes it possible for unauthenticated attackers to update plugin settings 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
Newsletter Email Subscribe versions 2.4 and earlier contain a cross-site request forgery (CSRF) vulnerability. An attacker can craft a malicious webpage that, when visited by a logged-in site administrator, performs unwanted actions on the newsletter plugin without the admin's knowledge or consent. The vulnerability requires the admin to visit the attacker's page but does not require the attacker to have any account or special privileges.
What an attacker can do
Perform unwanted actions on the newsletter plugin by tricking an admin into visiting a malicious webpage.
Potential impact on your site
An attacker can modify newsletter settings or subscriber data if an admin visits a malicious link.
Conditions required to exploit
Site admin must visit an attacker-controlled webpage while logged into the WordPress site.
Key dates
External resources
