CVE-2026-76931: Zephyr Project Manager <= 3.3.205 - Authenticated (Custom+) Stored Cross-Site Scripting via 'message' Parameter
The Zephyr Project Manager plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘message’ parameter in all versions up to, and including, 3.3.205 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Custom-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The vulnerability can only be exploited when the 'Directly link to project' plugin setting is disabled.
Affected Software
Event History
Frequently Asked Questions
Who can exploit this issue?
An attacker must be authenticated to WordPress with Custom-level access or higher in the Zephyr Project Manager plugin. The attack can be performed over the network without user interaction from the attacker.
Are default plugin settings affected?
Exploitation is only possible when the plugin's “Directly link to project” setting is disabled. Sites with that setting enabled are not exploitable under the stated condition.
What is the impact if exploitation succeeds?
An attacker can store arbitrary web script through the message parameter. The script executes in the browser whenever a user visits a page containing the injected content, and may affect confidentiality and integrity in that user's browser context.
How can exposure be reduced if updating is not immediately possible?
Enable the “Directly link to project” plugin setting, since the vulnerability requires it to be disabled. Also restrict Custom-level and higher plugin access to trusted users.