What’s Vulnerable › Vulnerabilities

CVE-2026-2721: MailArchiver <= 4.4.0 - Authenticated (Administrator+) Stored Cross-Site Scripting via Settings

• Severity: medium (CVSS 4.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-03-07 · updated 2026-06-17
• Weakness: CWE-79

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.

Affected products

• pierrelannoy MailArchiver: through 4.4.0

References

• https://github.com/Pierre-Lannoy/wp-mailarchiver/commit/946c1a700bbecc6080a427fd428de800334af824
• https://plugins.trac.wordpress.org/browser/mailarchiver/tags/4.4.0/includes/system/class-form.php#L126
• https://plugins.trac.wordpress.org/browser/mailarchiver/tags/4.4.0/includes/system/class-form.php#L156
• https://plugins.trac.wordpress.org/browser/mailarchiver/tags/4.4.0/includes/system/class-form.php#L55
• https://plugins.trac.wordpress.org/browser/mailarchiver/tags/4.4.0/includes/system/class-form.php#L92
• https://plugins.trac.wordpress.org/browser/mailarchiver/trunk/includes/system/class-form.php#L92
• https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3465101%40mailarchiver&new=3465101%40mailarchiver&sfp_email=&sfph_mail=
• https://www.wordfence.com/threat-intel/vulnerabilities/id/df2674c9-da77-412c-a812-f1749f54d04b?source=cve

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