What is CVE-2018-6013?

CVE-2018-6013 is a medium-severity vulnerability in Bigtreecms Bigtree Cms, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2018-01-23.

How severe is CVE-2018-6013?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Bigtreecms Bigtree Cms

CVE-2018-6013

Cross-site scripting (XSS) in BigTree 4.2.19 allows any remote users to inject arbitrary web script or HTML via the directory parameter. This issue exists in core/admin/ajax/developer/extensions/file-browser.php.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2018-01-23 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.008 (56.1th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 56.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Bigtreecms Bigtree Cms — versions 4.2.19

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

github.com/bigtreecms/BigTree-CMS/issues/327 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2018-6013?: CVE-2018-6013 is a medium-severity vulnerability in Bigtreecms Bigtree Cms, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2018-01-23.
How severe is CVE-2018-6013?: Medium severity. CVSS v3 base score is 5.4 out of 10.