Stored Cross-Site Scripting Vulnerability in Modern Events Calendar Lite for WordPress
CVE-2023-4021

4.8MEDIUM

Key Information:

Vendor
Wordpress
Status
Modern Events Calendar Lite
Vendor
CVE Published:
20 October 2023

Summary

The Modern Events Calendar Lite plugin for WordPress allows for Stored Cross-Site Scripting due to inadequate input sanitization and output escaping. Authenticated attackers with administrator-level permissions can exploit this vulnerability by injecting malicious web scripts via the Google API key and Calendar ID. This risk is particularly pronounced in multi-site installations and setups where the unfiltered_html option is disabled, leading to potential execution of harmful scripts when users access compromised pages.

Affected Version(s)

Modern Events Calendar Lite * < 7.1.0

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://webnus.net/modern-events-calendar/change-log/

CVSS V3.1

Score:
4.8
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Marco Wotschka
.