What’s Vulnerable › Vulnerabilities
CVE-2026-78363: MW WP Form < 5.1.5 - Unauthenticated Arbitrary Shortcode Execution via Completion Message Merge Tags
- Severity: medium (CVSS 4.8 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-09-01 · updated 2026-09-01
- Weakness: CWE-74
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.
Affected products
- MW WP Form: before 5.1.5 — fixed in 5.1.5
How to fix
Upgrade to a fixed version: MW WP Form 5.1.5. Check the vendor advisory for mitigations.
References
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