CP Multi View Events Calendar Security & Risk Analysis

The "cp-multi-view-calendar" plugin v1.4.34 exhibits a mixed security posture. While it demonstrates good practices like a high percentage of prepared SQL statements and properly escaped output, several significant concerns exist. The presence of `unserialize` in its code signals a potential for deserialization vulnerabilities, especially if user-controlled data is involved. Furthermore, the taint analysis reveals a concerning five high-severity flows with unsanitized paths, indicating potential for various injection attacks if these flows are not properly handled.

The plugin's vulnerability history is particularly alarming, with six known CVEs, including one critical and one high severity, and one critical vulnerability remaining unpatched. The common vulnerability types such as Missing Authorization, Improper Authorization, Cross-site Scripting (XSS), and SQL Injection are deeply concerning and suggest recurring weaknesses in how user input is validated and access is controlled. The recent nature of the last vulnerability (2025-09-22) also suggests ongoing security challenges.

In conclusion, despite some positive aspects in its static analysis regarding SQL and output handling, the presence of dangerous functions like `unserialize`, high-severity taint flows, and a history of multiple, severe, and unpatched vulnerabilities make this plugin a significant risk. Users should exercise extreme caution.