What the vulnerability does
01Description
The Icegram Express - Email Subscribers, Newsletters and Marketing Automation Plugin for WordPress is vulnerable to Missing 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 `run_action_scheduler_task` function. This makes it possible for unauthenticated attackers to execute scheduled actions early or repeatedly by guessing action IDs, potentially triggering email sends, maintenance tasks, or other privileged operations, causing unexpected state changes and resource usage.
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.
Potential impact on your site
04Site Impact
Attackers can alter plugin data, posts, or settings without a valid account.
Conditions required to exploit
05Prerequisites
Network access only; no authentication or user interaction required.
Key dates
06Disclosure timeline
December 12, 2025
CVE published
April 8, 2026
Record updated
