What is CVE-2020-28184?

CVE-2020-28184 is a medium-severity vulnerability in Terra-Master Tos, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2020-12-24.

How severe is CVE-2020-28184?

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

XSS in Terra-Master Tos

CVE-2020-28184

Cross-site scripting (XSS) vulnerability in TerraMaster TOS <= 4.2.06 allows remote authenticated users to inject arbitrary web script or HTML via the mod parameter to /module/index.php.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2020-12-24 · 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: 0.009 (57.2th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 57th percentile — 57.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: +0.000

Affected products

Terra-Master Tos

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

www.terra-master.com/ (Vendor Advisory)
www.ihteam.net/advisory/terramaster-tos-multiple-vulnerabilities/ (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2020-28184?: CVE-2020-28184 is a medium-severity vulnerability in Terra-Master Tos, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2020-12-24.
How severe is CVE-2020-28184?: Medium severity. CVSS v3 base score is 5.4 out of 10.