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Fencer Vulns
high 8.3

CVE-2021-22978 json

On BIG-IP version 16.0.x before 16.0.1, 15.1.x before 15.1.1, 14.1.x before 14.1.3.1, 13.1.x before 13.1.3.5, and all 12.1.x and 11.6.x ver…

published 2021-02-12 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-10096

cvss
8.3
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.8%
EPSS 0.8% chance of exploitation in 30 days, percentile 57%
public exploits
0
none known

Summary

On BIG-IP version 16.0.x before 16.0.1, 15.1.x before 15.1.1, 14.1.x before 14.1.3.1, 13.1.x before 13.1.3.5, and all 12.1.x and 11.6.x versions, undisclosed endpoints in iControl REST allow for a reflected XSS attack, which could lead to a complete compromise of BIG-IP if the victim user is granted the admin role. Note: Software versions which have reached End of Software Development (EoSD) are not evaluated.

Patch / fix

  • f5 big-ip_access_policy_manager 13.1.3.5, 14.1.3.1, 15.1.1, 16.0.1
  • f5 big-ip_advanced_firewall_manager 13.1.3.5, 14.1.3.1, 15.1.1, 16.0.1
  • f5 big-ip_advanced_web_application_firewall 13.1.3.5, 14.1.3.1, 15.1.1, 16.0.1
  • f5 big-ip_analytics 13.1.3.5, 14.1.3.1, 15.1.1, 16.0.1
  • f5 big-ip_application_acceleration_manager 13.1.3.5, 14.1.3.1, 15.1.1, 16.0.1
  • f5 big-ip_application_security_manager 13.1.3.5, 14.1.3.1, 15.1.1, 16.0.1
  • f5 big-ip_ddos_hybrid_defender 13.1.3.5, 14.1.3.1, 15.1.1, 16.0.1
  • f5 big-ip_domain_name_system 13.1.3.5, 14.1.3.1, 15.1.1, 16.0.1
  • f5 big-ip_fraud_protection_service 13.1.3.5, 14.1.3.1, 15.1.1, 16.0.1
  • f5 big-ip_global_traffic_manager 13.1.3.5, 14.1.3.1, 15.1.1, 16.0.1
  • f5 big-ip_link_controller 13.1.3.5, 14.1.3.1, 15.1.1, 16.0.1
  • f5 big-ip_local_traffic_manager 13.1.3.5, 14.1.3.1, 15.1.1, 16.0.1
  • f5 big-ip_policy_enforcement_manager 13.1.3.5, 14.1.3.1, 15.1.1, 16.0.1
  • f5 big-ip_ssl_orchestrator 13.1.3.5, 14.1.3.1, 15.1.1, 16.0.1

Exploit prediction

0.83% chance of exploitation in the next 30 days, higher than 57% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 8.3 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
NVD 2.0 5.1 AV:N/AC:H/Au:N/C:P/I:P/A:P

Affected products

  • n/a BIG-IP

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.