CVE-2026-86833
MetForm < 4.3.1 - Unauthenticated HTML Injection in Notification Emails via Field Shortcodes
CVSS Score
5.4
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | unknown |
| Product | metform |
| Published | Oct 7, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
Unknown / MetForm
0 < 4.3.1
References
Credits
vuxvinh WPScan