What’s Vulnerable › Vulnerabilities

CVE-2021-42258: BQE BillQuick Web Suite SQL Injection Vulnerability

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: yes — in CISA KEV since 2021-11-03
• EPSS: 75.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-10-22 · updated 2026-06-17
• Weakness: CWE-89

Description

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.

Affected products

• Bqe Billquick Web Suite: from 19 before 22.0.9.1 — fixed in 22.0.9.1

How to fix

Upgrade to a fixed version: Bqe Billquick Web Suite 22.0.9.1. Check the vendor advisory for mitigations.

References

• https://www.huntress.com/blog/threat-advisory-hackers-are-exploiting-a-vulnerability-in-popular-billing-software-to-deploy-ransomware
• https://www.huntress.com/blog/threat-advisory-hackers-are-exploiting-a-vulnerability-in-popular-billing-software-to-deploy-ransomware
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-42258

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