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Modern Events Calendar Lite EUVDEUVD-2021-34683

| CVE-2021-4458 MEDIUM
SQL Injection (CWE-89)
2025-07-12 security@wordfence.com
5.9
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
5.9 MEDIUM
AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

Lifecycle Timeline

4
EUVD ID Assigned
Mar 16, 2026 - 08:56 euvd
EUVD-2021-34683
Analysis Generated
Mar 16, 2026 - 08:56 vuln.today
Patch released
Mar 16, 2026 - 08:56 nvd
Patch available
CVE Published
Jul 12, 2025 - 12:15 nvd
MEDIUM 5.9

DescriptionCVE.org

The Modern Events Calendar Lite plugin for WordPress is vulnerable to SQL Injection via the 'id' parameter of the 'wp_ajax_mec_load_single_page' AJAX action in all versions up to, and including, 6.3.0 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for unauthenticated attackers to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database. This is only exploitable on sites with addslashes disabled.

Analysis

The Modern Events Calendar Lite plugin for WordPress is vulnerable to SQL Injection via the 'id' parameter of the 'wp_ajax_mec_load_single_page' AJAX action in all versions up to, and including, 6.3.0 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for unauthenticated attackers to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database. This is only exploitable on sites with addslashes disabled.

Technical ContextAI

SQL injection occurs when user-supplied input is incorporated into SQL queries without proper sanitization or parameterized queries.

RemediationAI

A vendor patch is available — apply it immediately. Use parameterized queries or prepared statements. Apply input validation and escape special characters. Implement least-privilege database accounts.

CVE-2021-24145 HIGH POC
7.2 Mar 18

Arbitrary file upload in the Modern Events Calendar Lite WordPress plugin, versions before 5.16.5, did not properly chec

CVE-2021-24946 CRITICAL POC
9.8 Dec 13

The Modern Events Calendar Lite WordPress plugin before 6.1.5 does not sanitise and escape the time parameter before usi

CVE-2021-24149 HIGH POC
8.8 Mar 18

Unvalidated input in the Modern Events Calendar Lite WordPress plugin, versions before 5.16.6, did not sanitise the mec[

CVE-2024-5441 HIGH
8.8 Jul 09

The Modern Events Calendar plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validat

CVE-2021-24146 HIGH POC
7.5 Mar 18

Lack of authorisation checks in the Modern Events Calendar Lite WordPress plugin, versions before 5.16.5, did not proper

CVE-2021-24925 MEDIUM POC
6.1 Dec 13

The Modern Events Calendar Lite WordPress plugin before 6.1.5 does not sanitise and escape the current_month_divider par

CVE-2024-6522 CRITICAL
9.6 Aug 07

The Modern Events Calendar plugin for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and

CVE-2022-0364 MEDIUM POC
5.4 Mar 21

The Modern Events Calendar Lite WordPress plugin before 6.4.0 does not sanitize and escape some of the Hourly Schedule p

CVE-2021-24716 MEDIUM POC
5.4 Nov 01

The Modern Events Calendar Lite WordPress plugin before 5.22.3 does not properly sanitize or escape values set by users

CVE-2021-24147 MEDIUM POC
5.4 Mar 18

Unvalidated input and lack of output encoding in the Modern Events Calendar Lite WordPress plugin, versions before 5.16.

CVE-2020-9459 MEDIUM POC
5.4 Feb 28

Multiple Stored Cross-site scripting (XSS) vulnerabilities in the Webnus Modern Events Calendar Lite plugin through 5.1.

CVE-2023-1400 MEDIUM POC
4.8 Mar 27

The Modern Events Calendar Lite WordPress plugin before 6.5.2 does not sanitise and escape some of its settings, which c

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EUVD-2021-34683 vulnerability details – vuln.today

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