CVE-2021-42258 : BQE BillQuick Web Suite 2018 through 2021 before 22.0.9.1 allows SQL injection f

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.

Published 2021-10-22 22:15:08

Updated 2025-03-19 20:50:35

Source MITRE

View at NVD, CVE.org

Vulnerability category: Sql InjectionExecute code

Products affected by CVE-2021-42258

BQE » Billquick Web Suite
Versions from including (>=) 19 and before (<) 22.0.9.1
cpe:2.3:a:bqe:billquick_web_suite:*:*:*:*:*:*:*:*
Matching versions

CVE-2021-42258 is in the CISA Known Exploited Vulnerabilities Catalog

This issue is known to have been leveraged as part of a ransomware campaign.

CISA vulnerability name:

BQE BillQuick Web Suite SQL Injection Vulnerability

CISA required action:

Apply updates per vendor instructions.

CISA description:

BQE BillQuick Web Suite contains an SQL injection vulnerability when accessing the username parameter that may allow for unauthenticated, remote code execution.

Notes:

https://nvd.nist.gov/vuln/detail/CVE-2021-42258

Added on 2021-11-03 Action due date 2021-11-17

Exploit prediction scoring system (EPSS) score for CVE-2021-42258

EPSS FAQ

93.90%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 100 %

Percentile, the proportion of vulnerabilities that are scored at or less

Metasploit modules for CVE-2021-42258

BillQuick Web Suite txtID SQLi

Disclosure Date: 2021-10-22

First seen: 2022-12-23

auxiliary/gather/billquick_txtid_sqli

This module exploits a SQL injection vulnerability in BillQUick Web Suite prior to version 22.0.9.1. The application is .net based, and the database is required to be MSSQL. Luckily the website gives error based SQLi messages, so it is trivial to pull data from the da

More information

CVSS scores for CVE-2021-42258

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source	First Seen
6.8	MEDIUM	AV:N/AC:M/Au:N/C:P/I:P/A:P	8.6	6.4	NIST
Access Vector: Network Access Complexity: Medium Authentication: None Confidentiality Impact: Partial Integrity Impact: Partial Availability Impact: Partial
9.8	CRITICAL	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	3.9	5.9	134c704f-9b21-4f2e-91b3-4a467353bcc0	2025-02-03
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: High Integrity: High Availability: High
9.8	CRITICAL	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	3.9	5.9	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: High Integrity: High Availability: High

CWE ids for CVE-2021-42258

CWE-89 Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')

The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component. Without sufficient removal or quoting of SQL syntax in user-controllable inputs, the generated SQL query can cause those inputs to be interpreted as SQL instead of ordinary user data.
Assigned by:
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)
- nvd@nist.gov (Primary)

References for CVE-2021-42258

https://www.huntress.com/blog/threat-advisory-hackers-are-exploiting-a-vulnerability-in-popular-billing-software-to-deploy-ransomware

Threat Advisory: Hackers Are Exploiting a Vulnerability in Popular Billing Software to Deploy Ransomware
Exploit;Third Party Advisory

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Vulnerability Details : CVE-2021-42258