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CVE-2021-42258

Known Exploited (CISA KEV)CRITICAL
9.8
CVSS Severity Score
EPSS Score85.1160%
EPSS Percentile87.56th
PublishedOct 22, 2021
Last ModifiedNov 10, 2025

Vulnerability 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 Platforms (CPE)

📦
Bqe

Billquick Web Suite

>= 19 and < 22.0.9.1

References & Advisories

🔗 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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