Cyber Resilience

CVE-2021-40959

Medium

Published: 20 December 2024

Published
20 December 2024
Modified
15 April 2026
KEV Added
Patch
CVSS Score v3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
EPSS Score 0.0017 37.5th percentile
Risk Priority 12 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2021-40959 is a medium-severity Cross-site Scripting (CWE-79) vulnerability in Rubiya (inferred from references). Its CVSS base score is 6.1 (Medium).

Operationally, ranked at the 37.5th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

A reflected cross-site scripting vulnerability in MONITORAPP Application Insight Web Application Firewall (AIWAF) <= 4.1.6 and <=5.0 was identified on the subpage `/process_management/process_status.xhr.php`. This vulnerability allows an attacker to inject malicious scripts that execute in the context of the victim's…

more

session.

CWE(s)

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

Rubiya
inferred from references and description; NVD did not file a CPE for this CVE

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

addresses: CWE-79

Penetration testing submits XSS payloads to web applications, detecting cross-site scripting flaws for subsequent remediation.

addresses: CWE-79

Validates web inputs to reject script-related content that could produce XSS.

addresses: CWE-79

Output validation against expected content can reject or sanitize script content in generated web pages, reducing XSS exploitability.

References