CVE-2026-36989 in LuxCal
Summary
by MITRE • 09/13/2026
A SQL Injection vulnerability exists in LuxSoft LuxCal through 5.3.4L via rssfeed.php and common/retrieve.php.
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Analysis
by VulDB Data Team • 09/13/2026
The identified security flaw represents a classic injection attack vector within the LuxCal calendar application, specifically affecting versions up to 5.3.4L. This vulnerability is rooted in insufficient input validation and sanitization mechanisms present in two critical script files: rssfeed.php and common/retrieve.php. These components are responsible for processing user-supplied data to generate RSS feeds or retrieve specific records from the underlying database. When an attacker submits maliciously crafted SQL code as part of standard HTTP requests targeting these endpoints, the application fails to properly distinguish between executable commands and data inputs. This failure allows the injected syntax to be interpreted directly by the backend Database Management System (DBMS), effectively bypassing intended access controls and logical boundaries defined within the application architecture.
From a technical perspective, this flaw aligns with CWE-89, which classifies SQL Injection as an issue where software constructs database queries using externally-influenced input without proper neutralization of elements that could alter query semantics. The operational impact of such a vulnerability is severe and multifaceted. An attacker can exploit the injection point to perform unauthorized data retrieval, potentially exposing sensitive user information including personal details, event schedules, or administrative credentials stored within the database. Furthermore, depending on the privileges granted to the database account used by the web application, an attacker may execute administrative operations such as modifying existing records, deleting critical data, or even executing system-level commands if the DBMS configuration permits it. This compromises the confidentiality, integrity, and availability of the service provided by LuxCal.
In terms of threat modeling and adversary behavior, this vulnerability maps directly to MITRE ATT&CK technique T1190, which describes Exploit Public-Facing Application attacks. Attackers frequently leverage SQL injection as an initial access vector or a method for data exfiltration against web applications that are accessible over the network. The presence of these vulnerabilities in rssfeed.php and common/retrieve.php suggests that the application processes query parameters derived from URL strings, POST bodies, or cookies without adequate filtering. This makes the vulnerability particularly dangerous because it can potentially be triggered remotely by an unauthenticated attacker simply by crafting specific HTTP requests to the affected endpoints.
To mitigate this risk, immediate remediation is required through software updates provided by LuxSoft for versions 5.3.4L and earlier. If updating is not immediately feasible, defensive measures should include implementing strict input validation that rejects any SQL metacharacters or suspicious patterns in user-supplied data. Additionally, the use of parameterized queries or prepared statements must be enforced across all database interactions within the affected scripts to ensure that user input is treated strictly as data rather than executable code. Network-level controls such as Web Application Firewalls can also provide a layer of defense by detecting and blocking known SQL injection signatures before they reach the application logic, although this should not replace direct patching or code remediation efforts.