P4Verified

CVE-2026-86833: MetForm 0 to before 4.3.1

CVE-2026-86833. CVSS 3.1 base score 5.4 (MEDIUM, Vendor/CNA).

Affected technology

MetForm · 0 to before 4.3.1
Vendor not specified by the source

Description’s affected range: before 4.3.1 does not sanitize or escape submitted form-field values before inserting them into the HTML body of its email notifications

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 3.1): Network (remote) · No privileges required · User interaction required

What an attacker can do

Unauthenticated attackers can inject arbitrary markup into the administrator and submitter notification emails the site sends. Vendor/CNA’s CVSS 3.1 assessment (base score 5.4/10) rates confidentiality and integrity impact as low; availability impact as none.

Published 2026-10-07 11:52:09.459085+00:00

CWE: CWE-74
CCR priority: 21.6 /100 (P4)
CVSS 3.1: 5.4 /10 · CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N · Vendor/CNA
KEV: no

Provenance

GitHub Advisory Database · Source record · observed 2026-10-07 13:20:35.851963+00:00 UTC
NVD CVE API 2.0 · Source record · observed 2026-10-07 11:49:32.540646+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2026-86833.html