CVE-2026-57322 in weMail Plugin
Summary
by MITRE • 06/26/2026
Unauthenticated Cross Site Scripting (XSS) in weMail <= 2.1.2 versions.
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Analysis
by VulDB Data Team • 06/28/2026
This vulnerability represents a critical security flaw in the weMail plugin for WordPress systems where unauthenticated users can execute malicious scripts through cross site scripting attacks. The vulnerability affects versions 2.1.2 and earlier, making it particularly concerning given the widespread use of WordPress platforms and email marketing solutions. The issue stems from insufficient input validation and output sanitization within the plugin's handling of user-supplied data, allowing attackers to inject malicious javascript code that executes in the context of other users' browsers.
The technical implementation of this vulnerability occurs when the plugin fails to properly sanitize or escape user-controllable parameters before rendering them in web pages. This lack of proper validation creates an environment where malicious actors can craft specially formatted requests containing script payloads that get executed when legitimate users view affected pages. The vulnerability falls under CWE-79 which specifically addresses cross site scripting flaws, and aligns with ATT&CK technique T1566.001 for initial access through spearphishing attachments or links, as attackers could leverage this vulnerability to deliver malicious payloads to unsuspecting users.
The operational impact of this vulnerability extends beyond simple script execution, as it can enable session hijacking, credential theft, and redirection to malicious sites. Attackers could potentially escalate privileges by exploiting the XSS to steal administrator cookies or credentials, allowing them to gain full control over affected WordPress installations. The unauthenticated nature means that any user visiting pages affected by this vulnerability becomes a potential target, making the attack surface particularly broad.
Mitigation strategies should include immediate patching to versions greater than 2.1.2 where the XSS vulnerabilities have been addressed through proper input validation and output encoding. Administrators should also implement additional security measures such as content security policies to restrict script execution, regular security audits of installed plugins, and monitoring for suspicious user activities or unexpected code modifications. The vulnerability demonstrates the critical importance of maintaining up-to-date software components and implementing defense-in-depth strategies to protect against persistent threats targeting web applications.