CVE-2026-93889 Mail logging <= 2.1.12 - Unauthenticated Stored Cross-Site Scripting via PHPMailer 'wp_mail_failed' Error Message
Unauthenticated attackers can inject scripts via mail error messages if a compatible form plugin is installed, affecting WordPress sites using this logging plugin.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-93889?
CVE-2026-93889 is a high-severity cross-site scripting vulnerability in wardee Mail logging & Catcher, published on 3 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-79
Which versions are affected by CVE-2026-93889?
How do I fix CVE-2026-93889?
No fix has been published for CVE-2026-93889 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-93889 being exploited?
There is no known exploitation of CVE-2026-93889 in the wild and no public exploit code.
Sources
Also known as GHSA-7wqp-vpcj-332m.