What the vulnerability does
01Description
The Icegram Express - Email Subscribers, Newsletters and Marketing Automation Plugin for WordPress is vulnerable to Authorization in versions up to, and including, 5.9.10. This is due to the plugin not properly verifying that a user is authorized to perform an action in the `trigger_mailing_queue_sending` function. This makes it possible for unauthenticated attackers to force immediate email sending, bypass the schedule, increase server load, and change plugin state (e.g., last-cron-hit), enabling abuse or DoS-like effects.
Explanation of Vulnerability in Simple Terms
02Summary
The Email Subscribers & Newsletters plugin for WordPress versions 5.9.10 and earlier contains a missing authentication check that allows unauthenticated attackers to modify data on the site. The vulnerability requires only network access and no user interaction. Site administrators should update to a version newer than 5.9.10 to remediate this issue.
What an attacker can do
03Attacker Capabilities
Modify site data without logging in or having any account.
Potential impact on your site
04Site Impact
Attackers can alter plugin data or settings without permission, potentially affecting email campaigns or subscriber information.
Conditions required to exploit
05Prerequisites
Network access only; no authentication or user interaction required.
Key dates
06Disclosure timeline
November 19, 2025
CVE published
April 8, 2026
Record updated
