MW WP Form < 5.1.5 — Unauthenticated Arbitrary Shortcode Execution
CVE-2026-78363Published · Updated Action summary
Affected: <5.1.5Update to 5.1.5 or newer
All remediation steps- Severity
- Medium6.5
- CVSS
- 6.5CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:NWhat does this vector mean?
AV:NAttack vector- Network
AC:LAttack complexity- Low
PR:NPrivileges required- None
UI:NUser interaction- None
S:UScope- Unchanged
C:LConfidentiality- Low
I:LIntegrity- Low
A:NAvailability- None
- Required access
- No account needed
- Exploit prediction (EPSS)
- No score
- CISA KEV
- Not listed
On this page8
Am I affected?
MW WP Form mw-wp-form
- Affected< 5.1.5
- Patched in5.1.5
Update to 5.1.5 or newer.
You are affected if you run < 5.1.5. Version 5.1.5 and later are not affected by this issue.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under MW WP Form.
- No admin access? Run a passive check of your site. It reads public files only.
- No account is needed to exploit this. Treat any exposed site on an affected version as at risk.
What to do
- Update to version 5.1.5, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch MW WP Form to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to Jakub Herman.
The MW WP Form plugin for WordPress is vulnerable to Arbitrary Shortcode Execution in all versions up to 5.1.5. This is due to missing neutralization of shortcode brackets in user-supplied values before they are substituted into the completion page content and processed by the WordPress shortcode parser. This makes it possible for unauthenticated attackers to execute arbitrary shortcodes registered on the site by injecting shortcode syntax into form fields that are echoed back on the completion page.
Exploits & references
Proof-of-concept & detection
No public proof-of-concept or detection template is known for this vulnerability.
Advisories & patches
- Advisorywordfence.com
Related CVEs
More in MW WP Form
All 14| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| Medium5.3 | Unauthenticated Sensitive Information Exposure in 'post_id' Parameter ≤5.1.7Update to 5.1.8 | CVE-2026-92086 | |
| High7.2 | Unauthenticated Stored Cross-Site Scripting via 'post_id' Parameter (via stored form-submitted post meta) ≤5.1.7Update to 5.1.8 | CVE-2026-96567 | |
| Medium4.4 | Authenticated (Editor+) Stored Cross-Site Scripting <5.1.6Update to 5.1.6 | CVE-2026-78364 | |
| Medium4.4 | Authenticated (Editor+) Stored Cross-Site Scripting via 'memo' Parameter ≤5.1.3Update to 5.1.4 | CVE-2026-8853 | |
| High7.2 | Unauthenticated Stored Cross-Site Scripting ≤5.1.3Update to 5.1.4 | CVE-2026-48871 |
- Medium5.3Unauthenticated Sensitive Information Exposure in 'post_id' Parameter
≤5.1.7Update to 5.1.8
- High7.2Unauthenticated Stored Cross-Site Scripting via 'post_id' Parameter (via stored form-submitted post meta)
≤5.1.7Update to 5.1.8
- Medium4.4Authenticated (Editor+) Stored Cross-Site Scripting
<5.1.6Update to 5.1.6
- Medium4.4Authenticated (Editor+) Stored Cross-Site Scripting via 'memo' Parameter
≤5.1.3Update to 5.1.4
- High7.2Unauthenticated Stored Cross-Site Scripting
≤5.1.3Update to 5.1.4
Timeline
CVE published
Severity medium, CVSS 6.5
Record last updated
Sources & licenses
Wordfence record- Vulnerability data
- Wordfence Intelligence. [object Object] Licensed under the CC BY-SA 4.0.
- CVE® identifiers
- [object Object]. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
- CVSS / CWE
- National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
- VulnCrest content
- Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.