CVE-2025-25222 in LuxCal Web Calendar
Summary
by MITRE • 02/18/2025
The LuxCal Web Calendar prior to 5.3.3M (MySQL version) and prior to 5.3.3L (SQLite version) contains an SQL injection vulnerability in retrieve.php. If this vulnerability is exploited, information in a database may be deleted, altered, or retrieved.
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Analysis
by VulDB Data Team • 09/15/2025
The vulnerability identified as CVE-2025-25222 affects the LuxCal Web Calendar application across its MySQL and SQLite database versions prior to 5.3.3M and 5.3.3L respectively. This issue resides within the retrieve.php script which serves as a critical component for data retrieval operations within the calendar application. The flaw represents a classic SQL injection vulnerability that can be exploited by malicious actors to manipulate the underlying database through crafted input parameters. The vulnerability stems from insufficient input validation and improper parameter handling within the application's database interaction logic, creating an attack surface where user-supplied data directly influences SQL query construction without adequate sanitization or preparation mechanisms.
The technical exploitation of this vulnerability allows attackers to execute arbitrary SQL commands against the database backend through the retrieve.php endpoint. When an attacker submits malicious input to the calendar application's data retrieval functions, the application fails to properly escape or parameterize the input before incorporating it into SQL queries. This creates opportunities for attackers to inject malicious SQL code that can manipulate database contents, potentially leading to unauthorized data access, modification, or deletion. The impact extends beyond simple data theft as attackers can leverage this vulnerability to gain deeper system access or cause data integrity issues that could compromise the entire calendar application's functionality and reliability.
From an operational perspective, this vulnerability poses significant risks to organizations relying on LuxCal for calendar management and scheduling services. The potential for data deletion, alteration, or retrieval creates multiple attack vectors that could disrupt business operations and compromise sensitive scheduling information. Organizations may face regulatory compliance issues if personal or proprietary scheduling data becomes compromised through unauthorized access. The vulnerability's impact is amplified by the fact that calendar applications often contain sensitive information about meeting schedules, resource allocations, and business planning that could be valuable to adversaries. The attack surface is particularly concerning given that calendar applications are frequently used in enterprise environments where they may contain confidential business information and serve as integration points for other enterprise systems.
Mitigation strategies for this vulnerability should include immediate application updates to versions 5.3.3M or 5.3.3L respectively for MySQL and SQLite deployments. Organizations should also implement input validation and parameterized queries as defensive measures to prevent similar issues in other components of their calendar infrastructure. Database access controls should be reviewed and restricted to minimize potential damage from successful exploitation attempts. The vulnerability aligns with CWE-89 which specifically addresses SQL injection flaws, and represents a common attack pattern categorized under ATT&CK technique T1071.004 for application layer protocol manipulation. Network segmentation and intrusion detection systems should be deployed to monitor for exploitation attempts, while regular security assessments should be conducted to identify and remediate similar vulnerabilities in other enterprise applications. Organizations should also consider implementing web application firewalls to provide additional protection against SQL injection attacks targeting the calendar application's data retrieval functions.