CVE-2021-23028: f5 big-ip_advanced_web_application_firewall Improper Input Validation
Vulnerability summary
CVE-2021-23028 is a high (CVSS 7.5) Improper Input Validation vulnerability in f5 big-ip_advanced_web_application_firewall. EPSS estimates a 0.93% chance of exploitation in the next 30 days, higher than 60.3% of scored vulnerabilities.
Timeline
- 14-09-2021PublishedVulnerability first disclosed.
- 03-08-2024Last modifiedVulnerability information updated.
Description
On version 16.0.x before 16.0.1.2, 15.1.x before 15.1.3.1, 14.1.x before 14.1.4.2, and 13.1.x before 13.1.4, when JSON content profiles are configured for URLs as part of an F5 Advanced Web Application Firewall (WAF)/BIG-IP ASM security policy and applied to a virtual server, undisclosed requests may cause the BIG-IP ASM bd process to terminate. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
CVSS metrics
2 scores · 1 source · 2 versionsEPSS trend
Probability
0.93%
Chance of exploitation in the next 30 days
Percentile
60%
Versus all other CVEs
30-day change
0.00 pp
From 0.93% on 21-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
F52 products
- big-ip_advanced_web_application_firewall≥ 13.1.3.5, ≤ 13.1.3.6 | ≥ 14.1.3.1, ≤ 14.1.4.1 | ≥ 15.1.1, < 15.1.3.1 | 16.0.1
- big-ip_application_security_manager≥ 13.1..3.5, ≤ 13.1.3.6 | ≥ 14.1.3.1, ≤ 14.1.4.1 | ≥ 15.1.0, < 15.1.3.1 | 16.0.1
1 vendor · 2 products