CVE-2021-23037
CRITICALCVSS 9.6/10EPSS 0.80%
Last modified
CVE-2021-23037 is a critical-severity vulnerability rated 9.6/10 on the CVSS scale. On all versions of 16.1.x, 16.0.x, 15.1.x, 14.1.x, 13.1.x, 12.1.x, and 11.6.x, a reflected cross-site scripting (XSS) vulnerability exists in an undisclosed page of the BIG-IP Configuration utility that allows an attacker to execute JavaScript in the context of the currently logged-in user. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.. EPSS estimates a 0.80% chance of exploitation in the next 30 days.
Description
On all versions of 16.1.x, 16.0.x, 15.1.x, 14.1.x, 13.1.x, 12.1.x, and 11.6.x, a reflected cross-site scripting (XSS) vulnerability exists in an undisclosed page of the BIG-IP Configuration utility that allows an attacker to execute JavaScript in the context of the currently logged-in user. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| F5 | Big-Ip Access Policy Manager | >= 11.6.0, <= 11.6.5 |
| F5 | Big-Ip Access Policy Manager | >= 12.1.0, <= 12.1.6 |
| F5 | Big-Ip Access Policy Manager | >= 13.1.0, <= 13.1.4 |
| F5 | Big-Ip Access Policy Manager | >= 14.1.0, <= 14.1.4 |
| F5 | Big-Ip Access Policy Manager | >= 15.1.0, <= 15.1.3 |
| F5 | Big-Ip Access Policy Manager | >= 16.0.0, <= 16.1.0 |
| F5 | Big-Ip Advanced Firewall Manager | >= 11.6.0, <= 11.6.5 |
| F5 | Big-Ip Advanced Firewall Manager | >= 12.1.0, <= 12.1.6 |
| F5 | Big-Ip Advanced Firewall Manager | >= 13.1.0, <= 13.1.4 |
| F5 | Big-Ip Advanced Firewall Manager | >= 14.1.0, <= 14.1.4 |
| F5 | Big-Ip Advanced Firewall Manager | >= 15.1.0, <= 15.1.3 |
| F5 | Big-Ip Advanced Firewall Manager | >= 16.0.0, <= 16.1.0 |
| F5 | Big-Ip Analytics | >= 11.6.0, <= 11.6.5 |
| F5 | Big-Ip Analytics | >= 12.1.0, <= 12.1.6 |
| F5 | Big-Ip Analytics | >= 13.1.0, <= 13.1.4 |
| F5 | Big-Ip Analytics | >= 14.1.0, <= 14.1.4 |
| F5 | Big-Ip Analytics | >= 15.1.0, <= 15.1.3 |
| F5 | Big-Ip Analytics | >= 16.0.0, <= 16.1.0 |
| F5 | Big-Ip Application Acceleration Manager | >= 11.6.0, <= 11.6.5 |
| F5 | Big-Ip Application Acceleration Manager | >= 12.1.0, <= 12.1.6 |
| F5 | Big-Ip Application Acceleration Manager | >= 13.1.0, <= 13.1.4 |
| F5 | Big-Ip Application Acceleration Manager | >= 14.1.0, <= 14.1.4 |
| F5 | Big-Ip Application Acceleration Manager | >= 15.1.0, <= 15.1.3 |
| F5 | Big-Ip Application Acceleration Manager | >= 16.0.0, <= 16.1.0 |
| F5 | Big-Ip Application Security Manager | >= 11.6.0, <= 11.6.5 |
| F5 | Big-Ip Application Security Manager | >= 12.1.0, <= 12.1.6 |
| F5 | Big-Ip Application Security Manager | >= 13.1.0, <= 13.1.4 |
| F5 | Big-Ip Application Security Manager | >= 14.1.0, <= 14.1.4 |
| F5 | Big-Ip Application Security Manager | >= 15.1.0, <= 15.1.3 |
| F5 | Big-Ip Application Security Manager | >= 16.0.0, <= 16.1.0 |
| F5 | Big-Ip Domain Name System | >= 11.6.0, <= 11.6.5 |
| F5 | Big-Ip Domain Name System | >= 12.1.0, <= 12.1.6 |
| F5 | Big-Ip Domain Name System | >= 13.1.0, <= 13.1.4 |
| F5 | Big-Ip Domain Name System | >= 14.1.0, <= 14.1.4 |
| F5 | Big-Ip Domain Name System | >= 15.1.0, <= 15.1.3 |
| F5 | Big-Ip Domain Name System | >= 16.0.0, <= 16.1.0 |
| F5 | Big-Ip Fraud Protection Service | >= 11.6.0, <= 11.6.5 |
| F5 | Big-Ip Fraud Protection Service | >= 12.1.0, <= 12.1.6 |
| F5 | Big-Ip Fraud Protection Service | >= 13.1.0, <= 13.1.4 |
| F5 | Big-Ip Fraud Protection Service | >= 14.1.0, <= 14.1.4 |
| F5 | Big-Ip Fraud Protection Service | >= 15.1.0, <= 15.1.3 |
| F5 | Big-Ip Fraud Protection Service | >= 16.0.0, <= 16.1.0 |
| F5 | Big-Ip Global Traffic Manager | >= 11.6.0, <= 11.6.5 |
| F5 | Big-Ip Global Traffic Manager | >= 12.1.0, <= 12.1.6 |
| F5 | Big-Ip Global Traffic Manager | >= 13.1.0, <= 13.1.4 |
| F5 | Big-Ip Global Traffic Manager | >= 14.1.0, <= 14.1.4 |
| F5 | Big-Ip Global Traffic Manager | >= 15.1.0, <= 15.1.3 |
| F5 | Big-Ip Global Traffic Manager | >= 16.0.0, <= 16.1.0 |
| F5 | Big-Ip Link Controller | >= 11.6.0, <= 11.6.5 |
| F5 | Big-Ip Link Controller | >= 12.1.0, <= 12.1.6 |
Showing 50 of 66 affected configurations. See NVD for the full list.
References
- https://support.f5.com/csp/article/K21435974Mitigation, Vendor Advisory
- https://support.f5.com/csp/article/K21435974Mitigation, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-23037?
On all versions of 16.1.x, 16.0.x, 15.1.x, 14.1.x, 13.1.x, 12.1.x, and 11.6.x, a reflected cross-site scripting (XSS) vulnerability exists in an undisclosed page of the BIG-IP Configuration utility that allows an attacker to execute JavaScript in the context of the currently logged-in user. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
How severe is CVE-2021-23037?
CVE-2021-23037 has a CVSS score of 9.6/10 (CRITICAL severity). The EPSS model estimates a 0.80% probability of exploitation in the next 30 days.
How do I fix CVE-2021-23037?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2021
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- CVE-2021-23032On version 16.x before 16.1.0, 15.1.x before 15.1.3.1, 14.1.…7.5
- CVE-2021-23033On BIG-IP Advanced WAF and BIG-IP ASM version 16.x before 16…7.5
- CVE-2021-23034On BIG-IP version 16.x before 16.1.0 and 15.1.x before 15.1.…7.5
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- CVE-2021-23036On version 16.0.x before 16.0.1.2, when a BIG-IP ASM and Dat…7.5
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- CVE-2021-23039On version 16.0.x before 16.0.1.2, 15.1.x before 15.1.3, 14.…7.5
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- CVE-2021-23040On BIG-IP AFM version 16.0.x before 16.0.1.2, 15.1.x before …8.8
- CVE-2021-23041On BIG-IP version 16.0.x before 16.0.1.2, 15.1.x before 15.1…6.1
- CVE-2021-23042On BIG-IP version 16.0.x before 16.0.1.2, 15.1.x before 15.1…7.5
Are you affected by CVE-2021-23037?
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Scan your code nowSource: NVD / NIST