CVE-2026-86833CWE-74
CVE-2026-86833
Medium · published October 7, 2026
What it is
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.
The record
Technical detail
- CVSS v3.1
- 5.4 · MEDIUM
- Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
- CVSS v4.0
- Not supplied
- EPSS
- 0.00162 · 5.1th percentile
- Weakness
- CWE-74 · Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
- Published
- 2026-10-07T11:17Z
References (1)
EPSS history
Timeline