CVE-2021-4458

| EUVD-2021-34683 MEDIUM
2025-07-12 [email protected]
5.9
CVSS 3.1
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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
Analysis Generated
Mar 16, 2026 - 08:56 vuln.today
EUVD ID Assigned
Mar 16, 2026 - 08:56 euvd
EUVD-2021-34683
Patch Released
Mar 16, 2026 - 08:56 nvd
Patch available
CVE Published
Jul 12, 2025 - 12:15 nvd
MEDIUM 5.9

DescriptionNVD

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.

AnalysisAI

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.

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CVE-2021-4458 vulnerability details – vuln.today

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