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Fencer Intel
medium 6.1

CVE-2018-6378 json

In Joomla! Core before 3.8.8, inadequate filtering of file and folder names leads to various XSS attack vectors in the media manager.

published 8y ago modified 4mo ago also EUVD-2018-18135

cvss
6.1
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.4%
EPSS 1.4% chance of exploitation in 30 days, percentile 71%
public exploits
0
none known

Summary

In Joomla! Core before 3.8.8, inadequate filtering of file and folder names leads to various XSS attack vectors in the media manager.

Patch / fix

  • joomla joomla! 3.8.8

Is CVE-2018-6378 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.

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Exploit prediction

1.36% chance of exploitation in the next 30 days, higher than 71% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.0 6.1 CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N

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.