Melhor Envio <= 3.0.7 - Authenticated (Contributor+) Missing Authorization to Plugin Mode Change
- ID
- WPSEC-2026-1971
- Plugin
- Melhor Envio (melhor-envio-cotacao)
- Affected
- from 3.0.6 before 3.0.8
- Remediation
- Update to 3.0.8 or later.
- CVSS 3.1
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
- Weakness
- CWE-862
- Usage
- Plugin Low · Affected versions None seen among sites WPSec scans, 2026-10-29
- Attack surface
- Melhor Envio on WPSec AttackSurface
- Fix released
- Published
Description
The Melhor Envio plugin for WordPress is vulnerable to unauthorized modification of data in versions 3.0.6 up to, and including, 3.0.7 due to a missing capability check on the 'melhor_envio_set_mode' admin-post handler (ModeNoticeController::handleModeSwitch). The handler only checks a nonce, and that nonce is printed on every wp-admin page to any logged-in user who can open the dashboard, both in the plugin's migration notice and in the inline 'wpApiSettingsMelhorEnvio' script. This makes it possible for authenticated attackers, with Contributor-level access and above, to switch the plugin between legacy and Melhor Integrador mode, which changes the shipping methods the store offers.
References
- https://wpsec.com/vuln/WPSEC-2026-1971/
- https://plugins.svn.wordpress.org/melhor-envio-cotacao/tags/3.0.8/
- https://wordpress.org/plugins/melhor-envio-cotacao/
Published by WPSec. Provided as is, without warranty. Corrections: contact us.
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