What the vulnerability does
01Description
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.
Explanation of Vulnerability in Simple Terms
02Summary
MailArchiver versions 4.4.0 and earlier contain a cross-site scripting (XSS) vulnerability that allows authenticated administrators to inject malicious scripts. The vulnerability requires user interaction—typically clicking a crafted link—and affects the scope beyond the vulnerable component. An attacker with high privileges can inject code that executes in other users' browsers, potentially compromising site security.
What an attacker can do
03Attacker Capabilities
Inject malicious scripts that execute in other users' browsers when they visit affected pages.
Potential impact on your site
04Site Impact
A compromised admin account could inject scripts affecting other users' sessions and data.
Conditions required to exploit
05Prerequisites
Administrator account access and victim must click a malicious link or visit a crafted page.
Key dates
06Disclosure timeline
March 7, 2026
CVE published
April 8, 2026
Record updated
