CVE-2026-93889
Received Received - Intake

Stored XSS in Mail Logging – WP Mail Catcher WordPress Plugin

Publication date: 2026-10-03

Last updated on: 2026-10-03

Assigner: Wordfence

Description
The Mail logging – WP Mail Catcher plugin for WordPress is vulnerable to Stored Cross-Site Scripting via PHPMailer 'wp_mail_failed' Error Message in all versions up to, and including, 2.1.12 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Successful exploitation requires a separately installed plugin, such as Contact Form 7, that passes unauthenticated user-controlled input into mail fields whose content PHPMailer will include in its failure error message.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published
2026-10-03
Last Modified
2026-10-03
Generated
2026-10-03
AI Q&A
2026-10-03
EPSS Evaluated
N/A
NVD
CVE-2026-93889
EUVD
EUVD-2026-91957

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
wp_mail_catcher wp_mail_catcher to 2.1.12 (inc)

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-79 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.

Attack-Flow Graph

AI Quick Actions

Instant insights powered by AI
Executive Summary

The Mail logging – WP Mail Catcher plugin for WordPress has a stored Cross-Site Scripting (XSS) vulnerability due to insufficient input sanitization and output escaping in PHPMailer's 'wp_mail_failed' error message. This allows unauthenticated attackers to inject malicious scripts into pages. Exploitation requires another plugin like Contact Form 7 to pass user input into mail fields that PHPMailer includes in error messages.

Detection Guidance

Detection requires checking for the Mail logging – WP Mail Catcher plugin version up to 2.1.12. Use WordPress admin to inspect installed plugins or run commands like 'wp plugin list' in WP-CLI. Look for the plugin and verify version.

Impact Analysis

Attackers could execute arbitrary web scripts on pages you visit, potentially stealing cookies, session tokens, or sensitive data. This could lead to account takeovers, defacement of your WordPress site, or further malware distribution. The impact depends on user privileges and site configuration.

Compliance Impact

This vulnerability could lead to unauthorized access to personal data, violating GDPR's data protection requirements. For HIPAA, it may expose protected health information if exploited on healthcare-related sites. Non-compliance risks fines and legal consequences depending on jurisdiction and data processed.

Mitigation Strategies

Update the Mail logging – WP Mail Catcher plugin to the latest version beyond 2.1.12. If an update is unavailable, consider disabling the plugin temporarily until a patch is released.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-93889. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart