What is CVE-2020-18467?

CVE-2020-18467 is a medium-severity vulnerability in Bigtreecms Bigtree Cms, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2021-08-26.

How severe is CVE-2020-18467?

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

XSS in Bigtreecms Bigtree Cms

CVE-2020-18467

Cross Site Scripting (XSS) vulnerabilty exists in BigTree-CMS 4.4.3 in the tag name field found in the Tags page under the General menu via a crafted website name by doing an authenticated POST HTTP request to admin/tags/create.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2021-08-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.005 (38.5th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 38.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Bigtreecms Bigtree Cms — versions 4.4.3

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

github.com/bigtreecms/BigTree-CMS/issues/364 (Exploit, Patch, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2020-18467?: CVE-2020-18467 is a medium-severity vulnerability in Bigtreecms Bigtree Cms, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2021-08-26.
How severe is CVE-2020-18467?: Medium severity. CVSS v3 base score is 5.4 out of 10.