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Fencer Intel
high 7.1

CVE-2019-3639 json

MWG UI: Cross-Frame Scripting vulnerability

published 7y ago modified 4mo ago also EUVD-2019-13274

cvss
7.1
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.2%
EPSS 1.2% chance of exploitation in 30 days, percentile 69%
public exploits
0
none known

Summary

Clickjack vulnerability in Adminstrator web console in McAfee Web Gateway (MWG) 7.8.2.x prior to 7.8.2.12 allows remote attackers to conduct clickjacking attacks via a crafted web page that contains an iframe via does not send an X-Frame-Options HTTP header.

Patch / fix

  • McAfee, LLC McAfee Web Gateway (MWG) 7.8.2.12

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Exploit prediction

1.24% chance of exploitation in the next 30 days, higher than 69% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.0 7.1 CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N
NVD 3.0 7.1 CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N
NVD 2.0 5.8 AV:N/AC:M/Au:N/C:P/I:P/A:N

Affected products

  • McAfee, LLC McAfee Web Gateway (MWG)

Classification

Weakness
  • CWE-1021 Improper Restriction of Rendered UI Layers or Frames

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.