CVE-2026-81534 Code injection in Email Customizer for WooCommerce (Pro)
Authenticated attackers with subscriber access can execute arbitrary PHP code via the template parameter, leading to full site compromise.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-81534?
CVE-2026-81534 is a high-severity code injection vulnerability in ThemeHigh Email Customizer for WooCommerce (Pro), published on 15 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The Email Customizer for WooCommerce (Pro) plugin for WordPress is vulnerable to Remote Code Execution in versions up to, and including, 3.9.5. This is due to insufficient authorization and input sanitization in the send_test_mail() function, which allows user-controlled PHP code to be written to executable files in the uploads directory. This makes it possible for authenticated attackers, with subscriber-level access and above, to execute arbitrary PHP code on the server, leading to full site compromise.
Weakness: CWE-74
Which versions are affected by CVE-2026-81534?
How do I fix CVE-2026-81534?
No fix has been published for CVE-2026-81534 yet. Limit exposure of the affected software until one is available.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-81534 being exploited?
There is no known exploitation of CVE-2026-81534 in the wild and no public exploit code.
Sources
Also known as GHSA-4pxj-xxwx-q7rf.