MW WP Form < 5.1.5 - Unauthenticated Arbitrary Shortcode Execution via Completion Message Merge Tags
Priority LOW 22CWE-74Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- —
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00243 15th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed MW WP Form (Unknown): 5.1.5
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Unknown | MW WP Form | before 5.1.5 | 5.1.5 | Patch available | CNA |
- MW WP Form VendorUnknown Affected before 5.1.5 Fixed in 5.1.5 Patch available CNA
Remediation
- Fix · CNA MW WP Form (Unknown) Fixed in 5.1.5
Timeline
- 2026-10-02 Threatist record created from CVE-2026-78363
- 2026-10-03 Alias added: GHSA-224h-2cg4-2prq
References
Sources
- CVE-2026-78363 · CVE Program
- CVE-2026-78363 · NVD
- FIRST EPSS
- GHSA-224h-2cg4-2prq · GitHub Advisory Database · CC BY 4.0
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