What is CVE-2018-13361?

CVE-2018-13361 is a medium-severity vulnerability in Terra-Master Terramaster Operating System, classified under Improper Input Validation. CVSS score: 5.3/10. Published 2018-11-27.

How severe is CVE-2018-13361?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Improper input validation in Terra-Master Terramaster Operating System

CVE-2018-13361

User enumeration in usertable.php in TerraMaster TOS version 3.1.03 allows attackers to list all system users via the "modgroup" parameter.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2018-11-27 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.169 (97.0th percentile), scored 2026-09-30.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 97th percentile — 97.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.169 · newest: 0.169 · change: 0.000

Affected products

Terra-Master Terramaster Operating System — versions 3.1.03

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

blog.securityevaluators.com/vulnerabilities-in-terramaster-tos-3-1-03-fb99cf88b… (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2018-13361?: CVE-2018-13361 is a medium-severity vulnerability in Terra-Master Terramaster Operating System, classified under Improper Input Validation. CVSS score: 5.3/10. Published 2018-11-27.
How severe is CVE-2018-13361?: Medium severity. CVSS v3 base score is 5.3 out of 10.