CVE-2026-86833
Medium
Description
The MetForm WordPress plugin before 4.3.1 does not sanitize or escape submitted form-field values before inserting them into the HTML body of its email notifications, allowing unauthenticated attackers to inject arbitrary markup into the administrator and submitter notification emails the site sends.
SeverityMedium
CVSS5.4
Exploit probability—
ProductMetForm
PublishedOct 7, 2026
First seenOct 7, 2026
Weakness typeCWE-74Injection
How to fix
Update
- MetForm4.3.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| MetForm | v < 4.3.1 | 4.3.1 |
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