vulnerability
WordPress Plugin: modern-events-calendar-lite: CVE-2023-4021: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 4 | (AV:N/AC:M/Au:M/C:P/I:P/A:N) | Sep 28, 2023 | May 15, 2025 | May 4, 2026 |
Severity
4
CVSS
(AV:N/AC:M/Au:M/C:P/I:P/A:N)
Published
Sep 28, 2023
Added
May 15, 2025
Modified
May 4, 2026
Description
The Modern Events Calendar lite plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Google API key and Calendar ID in versions up to, but not including, 7.1.0 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.
Solution
modern-events-calendar-lite-plugin-cve-2023-4021
References
Rapid7 Labs
2026 Global Threat Landscape Report
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