CVE-2025-62192 identifies an SQL Injection vulnerability in Japan Total System Co., Ltd.'s GroupSession collaboration software, specifically affecting the Free edition prior to version 5.3.0, byCloud prior to 5.3.3, and ZION prior to 5.3.2. The vulnerability arises from improper neutralization of special elements used in SQL commands, allowing an authenticated user to inject malicious SQL code. This can lead to unauthorized reading or modification of data stored in the backend database. The vulnerability has a CVSS 3.0 base score of 5.4, reflecting a medium severity level. The attack vector is network-based, with low complexity, but requires the attacker to have valid user credentials (privileges required) and does not require user interaction. Although no known exploits are currently reported in the wild, the potential for data leakage or unauthorized data manipulation exists if exploited. The flaw affects multiple editions of GroupSession, a collaboration and groupware platform, which is used for internal communication and document management. The root cause is insufficient input sanitization or failure to use parameterized queries, allowing special characters in SQL commands to alter query logic. This vulnerability could be exploited by malicious insiders or attackers who have compromised user credentials to escalate their access or extract sensitive information from the database. The vulnerability was published on December 12, 2025, with the assigner being JPCERT, indicating a credible source. No official patches or links were provided in the data, but upgrading to the fixed versions (5.3.0 or later for Free edition, 5.3.3 or later for byCloud, and 5.3.2 or later for ZION) is the recommended remediation.

For European organizations using GroupSession products, this vulnerability poses a risk to the confidentiality and integrity of sensitive data stored within the collaboration platform's database. Exploitation could allow an authenticated user to access unauthorized information, modify records, or disrupt data accuracy, potentially impacting business operations and compliance with data protection regulations such as GDPR. Since the attack requires valid credentials, the threat is heightened in environments where user accounts are not tightly controlled or where credential compromise is possible. The vulnerability does not directly affect availability, but data integrity issues could indirectly disrupt workflows. Organizations relying on GroupSession for internal communication and document management could face operational risks and reputational damage if sensitive data is exposed or altered. The medium severity rating suggests a moderate but non-trivial risk, emphasizing the need for timely patching and monitoring of user activities to detect potential exploitation attempts.

1. Upgrade affected GroupSession products to the fixed versions: Free edition to 5.3.0 or later, byCloud to 5.3.3 or later, and ZION to 5.3.2 or later. 2. Implement strict input validation and sanitization on all user inputs that interact with SQL queries to prevent injection of malicious code. 3. Use parameterized queries or prepared statements in the application code to ensure SQL commands are constructed safely. 4. Enforce strong authentication mechanisms and monitor user access logs to detect anomalous behavior indicative of credential compromise or misuse. 5. Limit user privileges to the minimum necessary to reduce the impact of any compromised accounts. 6. Conduct regular security audits and code reviews focusing on injection vulnerabilities. 7. Employ Web Application Firewalls (WAFs) with SQL Injection detection capabilities as an additional layer of defense. 8. Educate users about phishing and credential security to reduce the risk of account compromise. 9. Maintain up-to-date backups of critical data to enable recovery in case of data tampering.