Skip to content
Fencer Intel
medium 4.8

CVE-2019-6639 json

On BIG-IP (AFM, PEM) 14.1.0-14.1.0.5, 14.0.0-14.0.0.4, 13.0.0-13.1.1.4, 12.1.0-12.1.4, 11.6.1-11.6.3.4, and 11.5.1-11.5.8, an undisclosed T…

published 7y ago modified 4mo ago also EUVD-2019-16198

cvss
4.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 52%
public exploits
0
none known

Summary

On BIG-IP (AFM, PEM) 14.1.0-14.1.0.5, 14.0.0-14.0.0.4, 13.0.0-13.1.1.4, 12.1.0-12.1.4, 11.6.1-11.6.3.4, and 11.5.1-11.5.8, an undisclosed TMUI pages for AFM and PEM Subscriber management are vulnerable to a stored cross-site scripting (XSS) issue. This is a control plane issue only and is not accessible from the data plane. The attack requires a malicious resource administrator to store the XSS.

Patch / fix

  • f5 big-ip_advanced_firewall_manager 11.5.9, 11.6.4, 12.1.4.1, 13.1.1.5, 14.0.0.5, 14.1.0.6
  • f5 big-ip_policy_enforcement_manager 11.5.9, 11.6.4, 12.1.4.1, 13.1.1.5, 14.0.0.5, 14.1.0.6

Is CVE-2019-6639 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

Exploit prediction

0.66% chance of exploitation in the next 30 days, higher than 52% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.1 4.8 CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
NVD 2.0 3.5 AV:N/AC:M/Au:S/C:N/I:P/A:N

Affected products

  • F5 BIG-IP (AFM, PEM)

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.