Medium
MetForm < 4.3.1 - Unauthenticated HTML Injection in Notification Emails via Field Shortcodes
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.
Announced Source revision 1
Original source ↗CVE-2026-86833
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-86833
MetForm
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "Unknown",
"product": "MetForm",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "4.3.1",
"versionType": "semver"
}
],
"collectionURL": "https://wordpress.org/plugins",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-86833
Source reference:
/cveMetadata/cveId
Publisher severity
medium
Source reference: /containers/cna/metrics
- Event
- #11774 · Revision 1
- Added to Heist Feed
- Publisher date