PT-2026-23818 · WordPress · Mailarchiver

Ronnachai Chaipha · Published 2026-03-07 · Updated 2026-03-07 · CVE-2026-2721

Positive Technologies (AI Summary)

CVSS v3.1

4.8

Medium

Base vector

AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions MailArchiver versions prior to 4.4.0

Description The MailArchiver plugin for WordPress is susceptible to Stored Cross-Site Scripting through admin settings. Insufficient input sanitization and output escaping allows authenticated attackers with administrator-level permissions or higher to inject arbitrary web scripts into pages. These scripts execute when a user accesses the injected page. This issue specifically impacts multi-site installations and those where unfiltered html has been disabled.

Recommendations Update MailArchiver to version 4.4.0 or later.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-2721

Affected Products

Mailarchiver

References · 12

• https://nvd.nist.gov/vuln/detail/CVE-2026-2721 · Security Note
• https://osv.dev/vulnerability/CVE-2026-2721 · Vendor Advisory
• https://github.com/Pierre-Lannoy/wp-mailarchiver/commit/946c1a700bbecc6080a427fd428de800334af824 · Note
• https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3465101%40mailarchiver&new=3465101%40mailarchiver&sfp_email=&sfph_mail= · Note
• https://plugins.trac.wordpress.org/browser/mailarchiver/tags/4.4.0/includes/system/class-form.php#L156 · Note
• https://twitter.com/CVEnew/status/2030339363977248926 · Twitter Post
• https://t.me/CVEtracker/46682 · Telegram Post
• https://plugins.trac.wordpress.org/browser/mailarchiver/tags/4.4.0/includes/system/class-form.php#L92 · Note
• https://plugins.trac.wordpress.org/browser/mailarchiver/trunk/includes/system/class-form.php#L92 · Note
• https://wordfence.com/threat-intel/vulnerabilities/id/df2674c9-da77-412c-a812-f1749f54d04b?source=cve · Note
• https://plugins.trac.wordpress.org/browser/mailarchiver/tags/4.4.0/includes/system/class-form.php#L55 · Note
• https://plugins.trac.wordpress.org/browser/mailarchiver/tags/4.4.0/includes/system/class-form.php#L126 · Note