Vulnerability Description
The MailArchiver plugin for WordPress is vulnerable to Stored Cross-Site Scripting via admin settings in all versions up to, and including, 4.4.0 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level permissions 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.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/Pierre-Lannoy/wp-mailarchiver/commit/946c1a700bbecc6080a427fd
- https://plugins.trac.wordpress.org/browser/mailarchiver/tags/4.4.0/includes/syst
- https://plugins.trac.wordpress.org/browser/mailarchiver/tags/4.4.0/includes/syst
- https://plugins.trac.wordpress.org/browser/mailarchiver/tags/4.4.0/includes/syst
- https://plugins.trac.wordpress.org/browser/mailarchiver/tags/4.4.0/includes/syst
- https://plugins.trac.wordpress.org/browser/mailarchiver/trunk/includes/system/cl
- https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old
- https://www.wordfence.com/threat-intel/vulnerabilities/id/df2674c9-da77-412c-a81
FAQ
What is CVE-2026-2721?
CVE-2026-2721 is a vulnerability with a CVSS score of 4.8 (MEDIUM). The MailArchiver plugin for WordPress is vulnerable to Stored Cross-Site Scripting via admin settings in all versions up to, and including, 4.4.0 due to insufficient input sanitization and output esca...
How severe is CVE-2026-2721?
CVE-2026-2721 has been rated MEDIUM with a CVSS base score of 4.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-2721?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.