Cyber Resilience

CVE-2021-22994

Medium

Published: 31 March 2021

Published
31 March 2021
Modified
21 November 2024
KEV Added
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Patch
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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 0.0032 55.2th percentile
Risk Priority 12 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2021-22994 is a medium-severity Cross-site Scripting (CWE-79) vulnerability in F5 Big-Ip Access Policy Manager. Its CVSS base score is 6.1 (Medium).

Operationally, ranked in the top 44.8% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

On BIG-IP versions 16.0.x before 16.0.1.1, 15.1.x before 15.1.2.1, 14.1.x before 14.1.4, 13.1.x before 13.1.3.6, 12.1.x before 12.1.5.3, and 11.6.x before 11.6.5.3, undisclosed endpoints in iControl REST allow for a reflected XSS attack, which could lead to a complete compromise…

more

of the BIG-IP system if the victim user is granted the admin role. This vulnerability is due to an incomplete fix for CVE-2020-5948. Note: Software versions which have reached End of Software Development (EoSD) are not evaluated.

CWE(s)
CWE-79

Related Threats

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

Affected Assets

f5
big-ip access policy manager
11.6.1 — 11.6.5.3 · 12.1.0 — 12.1.5.3 · 13.1.0 — 13.1.3.6
f5
big-ip advanced firewall manager
11.6.1 — 11.6.5.3 · 12.1.0 — 12.1.5.3 · 13.1.0 — 13.1.3.6
f5
big-ip advanced web application firewall
11.6.1 — 11.6.5.3 · 12.1.0 — 12.1.5.3 · 13.1.0 — 13.1.3.6
f5
big-ip analytics
11.6.1 — 11.6.5.3 · 12.1.0 — 12.1.5.3 · 13.1.0 — 13.1.3.6
f5
big-ip application acceleration manager
11.6.1 — 11.6.5.3 · 12.1.0 — 12.1.5.3 · 13.1.0 — 13.1.3.6
f5
big-ip application security manager
11.6.1 — 11.6.5.3 · 12.1.0 — 12.1.5.3 · 13.1.0 — 13.1.3.6
f5
big-ip ddos hybrid defender
11.6.1 — 11.6.5.3 · 12.1.0 — 12.1.5.3 · 13.1.0 — 13.1.3.6
f5
big-ip domain name system
11.6.1 — 11.6.5.3 · 12.1.0 — 12.1.5.3 · 13.1.0 — 13.1.3.6
f5
big-ip fraud protection service
11.6.1 — 11.6.5.3 · 12.1.0 — 12.1.5.3 · 13.1.0 — 13.1.3.6
f5
big-ip global traffic manager
11.6.1 — 11.6.5.3 · 12.1.0 — 12.1.5.3 · 13.1.0 — 13.1.3.6
+4 more product configuration(s) — see NVD for full list

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.

CA-8 Penetration Testing
addresses: CWE-79

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

SI-10 Information Input Validation
addresses: CWE-79

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

SI-15 Information Output Filtering
addresses: CWE-79

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

References