CVE-2018-6377
MediumIn Joomla!
Published Jan 30, 2018 · Updated Jul 8, 2026
Key Facts
Patch immediately- CVE-2018-6377 is a medium-severity vulnerability (CVSS 6.1 v3.1) affecting Joomla\!.
- It is not listed in any known-exploited vulnerabilities catalog. No public exploit code is known.
- EPSS estimates a 57% probability of exploitation in the next 30 days.
- Fixed versions are available, including Joomla\! 3.8.4.
- Brandefense priority: patch immediately, because it is very likely to be exploited soon.
CVSS v3.1
6.1
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
EPSS (30-day exploit likelihood)
57%
Higher than 99.0% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
None known
Get the full CVE-2018-6377 brief as a PDF
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Description
In Joomla! before 3.8.4, inadequate input filtering in com_fields leads to an XSS vulnerability in multiple field types, i.e., list, radio, and checkbox
Affected Products
1 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Joomla\!Joomla | See advisory | 3.8.4 |
Patched Releases
Joomla\!
3.8.4
Timeline
Publicly disclosed
Jan 30, 2018
Last updated
Jul 8, 2026
Weakness Type
- CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
References
FAQ
Common Questions.
In Joomla!
Affected: Joomla\!. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including Joomla\! 3.8.4.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.
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