What’s Vulnerable › Vulnerabilities

CVE-2020-5950

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-12-11 · updated 2026-06-17
• Weakness: CWE-79

Description

On BIG-IP 14.1.0-14.1.2.6, undisclosed endpoints in iControl REST allow for a reflected XSS attack, which could lead to a complete compromise of the BIG-IP system if the victim user is granted the admin role.

Affected products

• BIG-IP: from 14.1.0 before 14.1.2.7 — fixed in 14.1.2.7

How to fix

Upgrade to a fixed version: BIG-IP 14.1.2.7. Check the vendor advisory for mitigations.

References

• https://support.f5.com/csp/article/K42696541
• https://support.f5.com/csp/article/K05204103
• https://support.f5.com/csp/article/K42696541

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