PostX <= 4.1.16 - Missing Authorization to Arbitrary Plugin Installation/Activation
33Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.8epss 38%
exploitation probability
38%top 2% of all CVEs
observed exploitation
nono source reports it
The Post Grid Gutenberg Blocks and WordPress Blog Plugin – PostX plugin for WordPress is vulnerable to unauthorized plugin installation/activation due to a missing capability check on the 'install_required_plugin_callback' function in all versions up to, and including, 4.1.16. This makes it possible for authenticated attackers, with Subscriber-level access and above, to install and activate arbitrary plugins which can be leveraged to achieve remote code execution if another vulnerable plugin is installed and activated.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
References
https://plugins.trac.wordpress.org/browser/ultimate-post/tags/4.1.16/classes/Importer.php#L94https://plugins.trac.wordpress.org/browser/ultimate-post/tags/4.1.16/classes/Initialization.php#L330https://plugins.trac.wordpress.org/changeset/3188636/ultimate-post/trunk/classes/Importer.phphttps://wordpress.org/plugins/ultimate-post/https://www.wordfence.com/threat-intel/vulnerabilities/id/076f36fb-c2fb-43e0-a027-1351d3995489?source=cve