CVE-2026-78363 MW WP Form < 5.1.5 - Unauthenticated Arbitrary Shortcode Execution via Completion Message Merge Tags
Unauthenticated attackers can execute arbitrary shortcodes in MW WP Form if the site is configured to echo submitted values, potentially leading to code execution.
- 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-2026-78363?
CVE-2026-78363 is a medium-severity code injection vulnerability in Unknown MW WP Form, published on 1 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The MW WP Form WordPress plugin before 5.1.5 does not prevent shortcodes in user-submitted values from being executed when it merges those values into a message that it later processes for shortcodes, allowing unauthenticated users to run any shortcode registered on the site. Exploitation requires the site to have been configured to echo a submitted value back to the visitor after submission.
Weakness: CWE-74
Which versions are affected by CVE-2026-78363?
How do I fix CVE-2026-78363?
No fix has been published for CVE-2026-78363 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-2026-78363 being exploited?
There is no known exploitation of CVE-2026-78363 in the wild and no public exploit code.
Sources
Also known as GHSA-224h-2cg4-2prq.