CVE-2026-0691
MEDIUMCVSS Vector
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N
Lifecycle Timeline
2Description
The CM E-Mail Blacklist - Simple email filtering for safer registration plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'black_email' parameter in all versions up to, and including, 1.6.2. This is due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.
Analysis
The CM E-Mail Blacklist plugin for WordPress through version 1.6.2 contains a stored XSS vulnerability in the 'black_email' parameter due to inadequate input sanitization and output escaping. Authenticated administrators can inject arbitrary JavaScript that executes for all users accessing affected pages, though exploitation is limited to multi-site installations or those with unfiltered_html disabled. …
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Remediation
Within 30 days: Identify affected systems running all and apply vendor patches as part of regular patch cycle. Verify Content-Security-Policy and output encoding.
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External POC / Exploit Code
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