Cyber Resilience

CVE-2023-4991

Quescom Nextbx Qwalerter 4.50

Published
15 September 2023
Modified
21 November 2024
CVSS Score v3.1 7.8
Click a component to see what it means
Raw vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.0024 15th percentile
Risk Priority 55 floored blend · peak EPSS

Summary

CVE-2023-4991 is a high-severity Unquoted Search Path or Element (CWE-428) vulnerability in Quescom Nextbx Qwalerter. Its CVSS base score is 7.8 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Path Interception (T1034); ranked at the 15th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability Data

A vulnerability was found in NextBX QWAlerter 4.50. It has been rated as critical. Affected by this issue is some unknown functionality of the file QWAlerter.exe. The manipulation leads to unquoted search path. It is possible to launch the attack…

more

on the local host. The identifier of this vulnerability is VDB-239804. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.

CWE(s)
CWE-428

Related Threats

MITRE ATT&CK Enterprise Techniques

T1034 Path Interception Persistence
**This technique has been deprecated.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2025-66269Shared CWE-428
CVE-2023-26911Shared CWE-428
CVE-2020-37061Shared CWE-428
CVE-2025-57227Shared CWE-428
CVE-2023-36658Shared CWE-428
CVE-2016-20086Shared CWE-428
CVE-2016-20091Shared CWE-428
CVE-2023-2331Shared CWE-428
CVE-2026-1585Shared CWE-428
CVE-2023-53947Shared CWE-428

Affected Assets

quescom
nextbx qwalerter
4.50

Mitigating Controls

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 mostly match
prevents

Secure SDLC practices directly prevent path-handling flaws such as unquoted elements during development.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.29 Security testing in development and acceptance mostly match
finds

Security testing in development can detect unquoted search-path issues before deployment.

A.8.19 Installation of software on operational systems partial match
degrades

Enforcing controlled software installation can prevent unquoted search-path elements in executables and scripts.

A.8.25 Secure development life cycle partial match
prevents

Secure development lifecycle practices include input validation and path handling that reduce unquoted search-path weaknesses.

A.8.27 Secure system architecture and engineering principles partial match
degrades

Secure system architecture and engineering principles require safe path construction and quoting conventions.

A.8.28 Secure coding partial match
prevents

Secure coding standards directly mandate quoting search paths and avoiding unsafe path construction.

A.8.32 Change management partial match
degrades

Change-management processes can enforce review of path-handling changes that might introduce unquoted elements.

References