Secuno
ENNL
Book demo

CVE-2021-42258

BQE BillQuick Web Suite SQL Injection

9.8 CRITICALActively exploited (CISA KEV)Used in ransomwarePublic exploitEPSS 74.4%
  1. Published22 Oct 2021
  2. Added to CISA KEV3 Nov 2021
  3. Remediation due17 Nov 2021
Actively exploited (CISA KEV)

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

Added to KEV: 3 Nov 2021Federal remediation due: 17 Nov 2021Used in ransomware

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Bqe Billquick Web Suite≥ 19 < 22.0.9.1

Remediation

Fixed in
Bqe Billquick Web Suite≥ 22.0.9.1

References

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

CVE-2026-891138.8
SAP Commerce Cloud does not sufficiently validate certain user-supplied input before it…
CVE-2026-1096088.8
Frappe ERPNext before 15.121.0 and 16.x before 16.34.0 contains an SQL injection…
CVE-2026-1095738.1
phpMyFAQ before 4.1.9 contains an SQL injection vulnerability in PdoMysql::escape(),…
CVE-2026-893028.6
The Post Voting System WordPress plugin through 1.0 does not properly sanitize and…
CVE-2026-892998.6
The WP Verify API WordPress plugin through 1.0.0 does not properly sanitize and escape…
CVE-2026-892978.6
The Loja Automática WordPress plugin through 1.0.0 does not properly sanitize and…

Frequently asked

Is CVE-2021-42258 being actively exploited?

Yes. CVE-2021-42258 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 3 Nov 2021. It has been used in ransomware campaigns.

How severe is CVE-2021-42258?

CVE-2021-42258 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 74.4% probability of exploitation.

Which products are affected by CVE-2021-42258?

Affected products include Bqe Billquick Web Suite.

How do I fix CVE-2021-42258?

Upgrade affected software to a fixed version, for example Bqe Billquick Web Suite 22.0.9.1 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2021-42258 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

See how prioritisation worksBook a demo

Get Patch this first every Monday

Five vulnerabilities that matter this week, ranked on real exploitation. Plain language, one email, no spam.

You can unsubscribe with one click from every issue. We handle your details as described in our privacy policy.

Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.