Vulnerability · Published Sep 1, 2026 · Assigned by WPScan

CVE-2026-78363MW WP Form < 5.1.5 - Unauthenticated Arbitrary Shortcode Execution via Completion Message Merge Tags

Medium 4.8

In plain English

A medium-severity injection in MW WP Form from Unknown. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 16% of all known vulnerabilities).

Severity (CVSS 3.1)4.8Medium

Exploit odds (30 days)0.2%top 84.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

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.

Affected products (as reported)

Vendor	Product	Versions
Unknown	MW WP Form	0 – before 5.1.5

Weakness: CWE-74 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

References

https://wpscan.com/vulnerability/0569c5f7-2001-4364-a68b-451b73f3a32a/ exploit, vdb-entry, technical-description