CVE-2025-26855 in Articles Calendar Extension
Summary
by MITRE • 07/18/2025
A SQL injection in Articles Calendar extension 1.0.0 - 1.0.1.0007 for Joomla allows attackers to execute arbitrary SQL commands.
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Analysis
by VulDB Data Team • 07/22/2025
The vulnerability identified as CVE-2025-26855 represents a critical SQL injection flaw within the Articles Calendar extension for Joomla platforms, affecting versions 1.0.0 through 1.0.1.0007. This security weakness resides in the extension's handling of user input parameters that are directly incorporated into database queries without adequate sanitization or parameterization. The flaw stems from improper input validation mechanisms that fail to distinguish between legitimate user data and maliciously crafted SQL commands, creating an avenue for unauthorized database access and manipulation.
The technical implementation of this vulnerability allows attackers to inject malicious SQL payloads through vulnerable input fields within the Articles Calendar extension interface. When user-supplied data is processed and concatenated directly into SQL query strings, an attacker can manipulate the query structure to execute arbitrary database operations. This includes but is not limited to data extraction, modification, deletion, or unauthorized access to sensitive information stored within the Joomla database. The vulnerability is classified under CWE-89 which specifically addresses SQL injection flaws in software applications where user input is improperly handled in database queries.
The operational impact of CVE-2025-26855 extends beyond simple data compromise, as successful exploitation could enable attackers to escalate privileges within the Joomla environment. An attacker could potentially gain access to administrative accounts, modify content, or extract sensitive user information including passwords stored in the database. The attack surface is particularly concerning given that Joomla is widely deployed content management systems used by numerous organizations, making this vulnerability attractive to threat actors seeking to compromise multiple targets. According to ATT&CK framework category T1190, this vulnerability represents a technique for exploitation through web application attacks, specifically targeting the persistence and privilege escalation phases of the attack lifecycle.
Organizations utilizing affected versions of the Articles Calendar extension should immediately implement mitigations including input validation, parameterized queries, and comprehensive application security testing. The recommended approach involves upgrading to the latest version of the extension where the vulnerability has been patched, implementing proper input sanitization routines, and deploying web application firewalls to monitor and block suspicious SQL injection attempts. Additionally, security monitoring should be enhanced to detect anomalous database access patterns that may indicate exploitation attempts. The vulnerability demonstrates the critical importance of proper input validation and parameterized queries in preventing SQL injection attacks, aligning with industry best practices established in standards such as OWASP Top Ten and NIST cybersecurity guidelines for web application security.