Modern Events Calendar Lite <= 6.1.6 - Subscriber+ Category Add Leading to Stored Cross-Site Scripting

5.4
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE CVE-2021-25046
CVSS 5.4 (Medium)
Publicly Published December 3, 2021
Last Updated January 22, 2024
Researcher Krzysztof Zając - CERT PL

Description

The Modern Events Calendar Lite WordPress plugin before 6.2.0 alloed any logged-in user, even a subscriber user, may add a category whose parameters are incorrectly escaped in the admin panel, leading to stored XSS.

Learn more about Cross-Site Scripting vulnerabilities and how to prevent them.

References

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Vulnerability Details for Modern Events Calendar Lite

Software Type Plugin
Software Slug modern-events-calendar-lite
Patched? Yes
Remediation Update to version 6.2.0, or a newer patched version
Affected Version
  • <= 6.1.6
Patched Version
  • 6.2.0

Recent vulnerabilities in Modern Events Calendar Lite

# Title CVE ID CVSS Researchers Date
1 Modern Events Calendar (Lite & Pro) <= 7.33.0 - Unauthenticated SQL Injection CVE-2026-11349 7.5 Anthony Cihan June 29, 2026
2 Modern Events Calendar Lite <= 6.3.0 - Unauthenticated SQL Injection CVE-2021-4458 5.9 July 11, 2025
3 Modern Events Calendar <= 7.21.9 - Information Exposure CVE-2025-5733 5.3 Abdullah Shittu June 5, 2025
4 Modern Events Calendar <= 7.12.1 - Authenticated (Subscriber+) Server Side Request Forgery CVE-2024-6522 8.5 Foxyyy August 6, 2024
5 Modern Events Calendar <= 7.11.0 - Authenticated (Subscriber+) Arbitrary File Upload CVE-2024-5441 8.8 Foxyyy July 8, 2024
6 Modern Events Calendar lite < 7.1.0 - Authenticated (Admin+) Stored Cross-Site Scripting CVE-2023-4021 4.4 Marco Wotschka September 28, 2023
7 Modern Events Calendar lite < 6.10.5 - Authenticated (Admin+) Stored Cross-Site Scripting CVE-2023-1400 4.4 Pavak Tiwari March 14, 2023
8 Modern Events Calendar Lite <= 6.2.9 - Authenticated (Contributor+) Cross-Site Scripting CVE-2022-30533 6.4 Tsutomu Aramaki June 1, 2022
9 Modern Events Calendar Lite <= 6.5.1 - Authenticated (Admin+) Stored Cross-Site Scripting CVE-2022-27848 5.5 Muhammad Daffa April 14, 2022
10 Modern Events Calendar Lite <= 6.3.0 - Stored Cross-Site Scripting CVE-2022-0364 6.4 Rohan Chaudhari February 28, 2022

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