Vulnerabilities / Blockons / WPSEC-2026-1058
Blockons <= 1.2.19 - Unauthenticated Arbitrary Email Sending via Contact Form Submission REST Endpoint
Medium 5.3
CWE-345Fixed in 1.2.20
- ID
- WPSEC-2026-1058
- Plugin
- Blockons – Gutenberg blocks for WordPress and WooCommerce websites (blockons)
- Affected
- from 1.2.04 before 1.2.20
- Remediation
- Update to 1.2.20 or later.
- CVSS 3.1
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
- Weakness
- CWE-345
- Usage
- Plugin Low · Affected versions None seen among sites WPSec scans, 2026-10-16
- Attack surface
- Blockons on WPSec AttackSurface
- Fix released
- Published
Description
The Blockons plugin for WordPress is vulnerable to arbitrary email sending via the blcns/v1/submit-form REST endpoint in all versions up to, and including, 1.2.19, due to the publicly accessible endpoint taking the recipient, CC, BCC and subject of the notification email from the request instead of from the contact form block's saved settings. This makes it possible for unauthenticated attackers to make the site send emails with attacker-chosen content to arbitrary recipients from the site's own sender address, which can be used for spam or phishing.
References
- https://wpsec.com/vuln/WPSEC-2026-1058/
- https://plugins.svn.wordpress.org/blockons/tags/1.2.20/
- https://wordpress.org/plugins/blockons/
Published by WPSec. Provided as is, without warranty. Corrections: contact us.
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