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

2026-03-06 11:56

Ronnachai Chaipha (rxnr)

Strategic Overview

Status

Patched in 4.5.0

Affected PluginMailArchiver

Affected Version<= 4.4.0

CVSS4.8Medium

CVECVE-2026-2721

View all MailArchiver vulnerabilities

Vulnerability Overview

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.

Technical Analysis

REMEDIATION: Update to version 4.5.0, or a newer patched version --- IDENTIFIER: CWE-79 (Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

External References

https://www.cve.org/CVERecord?id=CVE-2026-2721 https://www.wordfence.com/threat-intel/vulnerabilities/id/df2674c9-da77-412c-a812-f1749f54d04b

CVSS Vector

4.8

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredHigh
User InteractionRequired
ScopeChanged
ConfidentialityLow
IntegrityLow
AvailabilityNone

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