CVE-2026-78363

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

MEDIUM

4.8

CVSS Score

Published: September 1, 2026 at 07:39 AM UTC

Updated: September 1, 2026 at 09:01 PM UTC

1 product affected across 1 vendorMW WP Form

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Severity

MEDIUM4.8

Exploit prediction

EPSS 0.2%

SSVC

No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

MW WP Form · Mw Wp Form Projectwordpress-plugin

60%

v < 5.1.5

Affected range stops below 5.1.5, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

ExploitVDB EntryTechnical Description

Source: cverecord

https://wpscan.com/vulnerability/0569c5f7-2001-4364-a68b-451b73f3a32a/

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

4.8MEDIUMWPScan

Vector?

Quick Info

StatusDEFERRED

CWE

CWE-74

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