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Fencer Vulns
medium 5.4

CVE-2020-5940 json

In versions 16.0.0-16.0.0.1, 15.1.0-15.1.0.5, and 14.1.0-14.1.2.3, a stored cross-site scripting (XSS) vulnerability exists in an undisclos…

published 2020-11-05 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-27094

cvss
5.4
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 44%
public exploits
0
none known

Summary

In versions 16.0.0-16.0.0.1, 15.1.0-15.1.0.5, and 14.1.0-14.1.2.3, a stored cross-site scripting (XSS) vulnerability exists in an undisclosed page of the BIG-IP Traffic Management User Interface (TMUI), also known as the BIG-IP Configuration utility.

Patch / fix

  • f5 big-ip_access_policy_manager 14.1.2.4, 15.1.1, 16.0.1
  • f5 big-ip_advanced_firewall_manager 14.1.2.4, 15.1.1, 16.0.1
  • f5 big-ip_analytics 14.1.2.4, 15.1.1, 16.0.1
  • f5 big-ip_application_acceleration_manager 14.1.2.4, 15.1.1, 16.0.1
  • f5 big-ip_application_security_manager 14.1.2.4, 15.1.1, 16.0.1
  • f5 big-ip_domain_name_system 14.1.2.4, 15.1.1, 16.0.1
  • f5 big-ip_edge_gateway 14.1.2.4, 15.1.1, 16.0.1
  • f5 big-ip_fraud_protection_service 14.1.2.4, 15.1.1, 16.0.1
  • f5 big-ip_global_traffic_manager 14.1.2.4, 15.1.1, 16.0.1
  • f5 big-ip_link_controller 14.1.2.4, 15.1.1, 16.0.1
  • f5 big-ip_local_traffic_manager 14.1.2.4, 15.1.1, 16.0.1
  • f5 big-ip_policy_enforcement_manager 14.1.2.4, 15.1.1, 16.0.1
  • f5 big-ip_webaccelerator 14.1.2.4, 15.1.1, 16.0.1

Exploit prediction

0.52% chance of exploitation in the next 30 days, higher than 44% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
NVD 2.0 3.5 AV:N/AC:M/Au:S/C:N/I:P/A:N

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.