Schedule Posts Calendar
Schedule Posts Calendar has 2 disclosed vulnerabilities in the WordSec catalog, all reported in 2023; all 2 are fixed as of September 2026. Their average CVSS score is 4.3, and the most serious one scores 4.4 out of 10. 2023 was the busiest year with 2 disclosures.
The most common weakness is Cross-Site Request Forgery (CSRF), behind 1 of the records (50%). Other recurring categories include Cross-Site Scripting.
Every one of the 2 issues recorded for Schedule Posts Calendar has a vendor fix available, so running the current release closes all known holes.
2 independent researchers contributed these findings, one record each. Schedule Posts Calendar is installed on roughly 1,000 WordPress sites, so each unpatched flaw has a wide blast radius. The current release is tested up to WordPress 6.4.10.
CVE-2023-40560Schedule Posts Calendar <= 5.2 - Authenticated (Administrator+) Stored Cross-Site Scripting via admin settings
Read the full analysisVulnerability Records

Schedule Posts Calendar
Author
Greg Ross
Adds a JavaScript calendar to the scheduled publish widget to allow you to select a date and time graphically instead of via the text entry boxes. This plugin uses the gpl’d dhtmlxcalendar (http://dhtmlx.com/docs/products/dhtmlxCalendar/index.shtml) for the calendar control. This code is released under the GPL v2, see license.txt for details. Roadmap None at this time.
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