What the vulnerability does
01Description
The Multicollab: Content Team Collaboration and Editorial Workflow plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the 'cf_add_comment' function in all versions up to, and including, 5.2. This makes it possible for authenticated attackers, with Subscriber-level access and above, to add comments to arbitrary collaborations.
Explanation of Vulnerability in Simple Terms
02Summary
Multicollab versions 5.2 and earlier lack proper authorization checks, allowing authenticated users to modify content they should not have access to. An attacker with low-level site access can alter editorial workflows or collaboration settings without proper permission validation. The vulnerability affects the core collaboration features of the plugin.
What an attacker can do
03Attacker Capabilities
Modify content or collaboration settings without proper authorization.
Potential impact on your site
04Site Impact
Unauthorized users can alter editorial workflows, collaboration data, or content status, compromising content integrity.
Conditions required to exploit
05Prerequisites
Attacker must have a low-privilege account on the site (e.g., contributor or subscriber role).
Key dates
06Disclosure timeline
May 16, 2026
CVE published
May 18, 2026
Record updated