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CVE-2020-5948

23
FAUCET Score

CVE-2020-5948 is a critical reflected Cross-Site Scripting (XSS) vulnerability affecting multiple versions of F5 BIG-IP systems. Undisclosed iControl REST endpoints allow an attacker to inject malicious scripts, which, if executed by an administrator, could lead to a complete compromise of the BIG-IP system. With a CVSS score of 9.6, this vulnerability is highly severe due to its network-based attack vector, low attack complexity, and high impact on confidentiality, integrity, and availability. While no public exploit code (Metasploit, Nuclei, ExploitDB) or active exploitation has been observed, and community discussion is minimal, the potential for severe impact necessitates patching.

Impacted Technologies

VendorProductVersion(s)CPE
>= 13.1.0, < 13.1.3.5CPE matchmatch criteria
cpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:*
>= 13.1.0, < 13.1.3.5CPE matchmatch criteria
cpe:2.3:a:f5:big-ip_advanced_firewall_manager:*:*:*:*:*:*:*:*
>= 13.1.0, < 13.1.3.5CPE matchmatch criteria
cpe:2.3:a:f5:big-ip_analytics:*:*:*:*:*:*:*:*
>= 13.1.0, < 13.1.3.5CPE matchmatch criteria
cpe:2.3:a:f5:big-ip_application_acceleration_manager:*:*:*:*:*:*:*:*
>= 13.1.0, < 13.1.3.5CPE matchmatch criteria
cpe:2.3:a:f5:big-ip_application_security_manager:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.6CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
6.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.01%
Probability of exploitation in next 30 days
EPSS Percentile
59.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0101 is in the 68th percentile among its peer group of 836 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.8 Bluesky, 0.5 Mastodon, and 1.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

support.f5.com / csp/article/K42696541
Vendor Advisory