MW WP Form permits unauthenticated shortcode execution
MW WP Form before 5.1.5 merges user-submitted values into a message and then processes that message for shortcodes. When a form is configured to echo a submitted value back after submission, an unauthenticated attacker can cause any shortcode registered on the site to execute.
- Component
- MW WP Form
- Plugin slug
mw-wp-form- Affected
- < 5.1.5
- Safe version
5.1.5- Published
- Sep 01, 2026
This CVE was published Sep 01, 2026 and is one of 11 known issues for this plugin.
Update, patch or deactivate.
Update to MW WP Form 5.1.5 or later. Until the update is applied, disable post-submission reflection of user-controlled values and review forms for unexpected shortcode content.
A safe version is available, so updating to that version or later is the preferred remediation. If an immediate update is not practical, consider a targeted application patch or temporarily restricting the affected functionality.
Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.
Technical 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.
CVE / CNA vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N