What the vulnerability does
01Description
The weMail - Email Marketing, Lead Generation, Optin Forms, Email Newsletters, A/B Testing, and Automation plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 2.0.7. This is due to the plugin's REST API trusting the `x-wemail-user` HTTP header to identify users without verifying the request originates from an authenticated WordPress session. This makes it possible for unauthenticated attackers who know or can guess an admin email (easily enumerable via `/wp-json/wp/v2/users`) to impersonate that user and access the CSV subscriber endpoints, potentially exfiltrating subscriber PII (emails, names, phone numbers) from imported CSV files.
Explanation of Vulnerability in Simple Terms
02Summary
weMail versions up to 2.0.7 contain an improper access control vulnerability that allows unauthenticated attackers to read sensitive information over the network. The vulnerability requires no user interaction and can be exploited remotely. Site administrators should update to a version newer than 2.0.7 to remediate this issue.
What an attacker can do
03Attacker Capabilities
Read sensitive information from the plugin without authentication.
Potential impact on your site
04Site Impact
Sensitive data may be exposed to unauthenticated visitors without your knowledge.
Conditions required to exploit
05Prerequisites
Network access only; no authentication or user interaction required.
Key dates
06Disclosure timeline
January 20, 2026
CVE published
April 8, 2026
Record updated
