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Critical9.6F5

Critical [CVE-2021-23037] BIG-IP: 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)…

This critical-severity F5 advisory covers CVE-2021-23037 affecting BIG-IP.

CVE-2021-23037 Published Sep 14, 2021Updated by vendor Jun 17, 2026
Affected products & platforms
F5BIG-IP
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Summary

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.

Affected versions
  • all versions

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Fixed versions

No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Mitigation

The source record does not include mitigation steps. That is not a statement that no fix exists — read the vendor advisory below for the authoritative guidance.

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

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