Actively exploited in the wild
BQE BillQuick Web Suite SQL Injection Vulnerability
BQE - BillQuick Web Suite · Listed in the CISA KEV since 2021-11-03. This indicates confirmed attacks in production environments.
Required action: Apply updates per vendor instructions.
CVE-2021-42258
CriticalCVSS 9.8KEVSummary
BQE BillQuick Web Suite 2018 through 2021 before 22.0.9.1 allows SQL injection for unauthenticated remote code execution, as exploited in the wild in October 2021 for ransomware installation. SQL injection can, for example, use the txtID (aka username) parameter. Successful exploitation can include the ability to execute arbitrary code as MSSQLSERVER$ via xp_cmdshell.
Risk Assessment
An attacker can remotely execute arbitrary code without authentication, leading to full server compromise and potential ransomware installation. The vulnerability is actively exploited, posing a high risk.
Recommendation
Immediately upgrade BQE BillQuick Web Suite to version 22.0.9.1 or later. If upgrade is not possible, isolate the application from the internet and monitor for suspicious activity.
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Original NVD description (English source)
BQE BillQuick Web Suite 2018 through 2021 before 22.0.9.1 allows SQL injection for unauthenticated remote code execution, as exploited in the wild in October 2021 for ransomware installation. SQL injection can, for example, use the txtID (aka username) parameter. Successful exploitation can include the ability to execute arbitrary code as MSSQLSERVER$ via xp_cmdshell.