CVE-2026-0691

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.

PUBLISHED Reserved 2026-01-07 | Published 2026-01-17 | Updated 2026-01-17 | Assigner Wordfence

Problem types

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Product status

Timeline

Credits

Phap Nguyen Anh finder

References

www.wordfence.com/...-bc25-4d65-9058-5b77c4f1b230?source=cve

plugins.trac.wordpress.org/...settings/email_blacklist.phtml

plugins.trac.wordpress.org/...settings/email_blacklist.phtml

plugins.trac.wordpress.org/...lacklist&sfp_email=&sfph_mail=

cve.org (CVE-2026-0691)

nvd.nist.gov (CVE-2026-0691)

Download JSON