LightStart <= 2.6.25 - Authenticated (Subscriber+) Missing Authorization to Gutenberg Mode Toggle
- ID
- WPSEC-2026-3127
- Plugin
- LightStart – Maintenance Mode, Coming Soon and Landing Page Builder (wp-maintenance-mode)
- Affected
- from 2.5.0 before 2.6.26
- Remediation
- Update to 2.6.26 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 Medium · Affected versions Medium among sites WPSec scans, 2026-11-14
- Attack surface
- LightStart on WPSec AttackSurface
- Fix released
- Published
Description
The LightStart – Maintenance Mode, Coming Soon and Landing Page Builder plugin for WordPress is vulnerable to unauthorized modification of data via the wpmm_toggle_gutenberg AJAX action in all versions up to, and including, 2.6.25, due to a missing capability check in the toggle_gutenberg() function and a nonce check whose action is built from the user-supplied 'source' parameter. A nonce from any of the plugin's admin notices passes the check, and some of those notices are shown to every logged-in user. This makes it possible for authenticated attackers, with Subscriber-level access and above, to switch the plugin between its classic and Gutenberg-based maintenance page modes, changing the page shown to visitors while maintenance mode is active.
References
- https://wpsec.com/vuln/WPSEC-2026-3127/
- https://plugins.svn.wordpress.org/wp-maintenance-mode/tags/2.6.26/
- https://wordpress.org/plugins/wp-maintenance-mode/
Published by WPSec. Provided as is, without warranty. Corrections: contact us.
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