CVE-2021-22993
Published: 31 March 2021
Summary
CVE-2021-22993 is a high-severity Cross-site Scripting (CWE-79) vulnerability in F5 Big-Ip Advanced Web Application Firewall. Its CVSS base score is 8.8 (High).
Operationally, ranked in the top 25.1% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2021-10111
Vulnerability details
On BIG-IP Advanced WAF and BIG-IP ASM versions 16.0.x before 16.0.1.1, 15.1.x before 15.1.2, 14.1.x before 14.1.3.1, 13.1.x before 13.1.3.6, and 12.1.x before 12.1.5.3, DOM-based XSS on DoS Profile properties page. Note: Software versions which have reached End of Software…
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Development (EoSD) are not evaluated.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
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.
Penetration testing submits XSS payloads to web applications, detecting cross-site scripting flaws for subsequent remediation.
Validates web inputs to reject script-related content that could produce XSS.
Output validation against expected content can reject or sanitize script content in generated web pages, reducing XSS exploitability.