vulnerability
WordPress Plugin: cm-email-blacklist: CVE-2026-0691: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 4 | (AV:N/AC:M/Au:M/C:P/I:P/A:N) | Jan 16, 2026 | Jan 19, 2026 | Jan 19, 2026 |
Severity
4
CVSS
(AV:N/AC:M/Au:M/C:P/I:P/A:N)
Published
Jan 16, 2026
Added
Jan 19, 2026
Modified
Jan 19, 2026
Description
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.
Solution
cm-email-blacklist-plugin-cve-2026-0691
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