CVE-2020-28187

Name: CVE-2020-28187
Creator: NVD / NIST
Published: 2020-12-24T15:15:13.297+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 16.35%

Last modified Jun 17, 2026

CVE-2020-28187 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Multiple directory traversal vulnerabilities in TerraMaster TOS <= 4.2.06 allow remote authenticated attackers to read, edit or delete any file within the filesystem via the (1) filename parameter to /tos/index.php?editor/fileGet, Event parameter to /include/ajax/logtable.php, or opt parameter to /include/core/index.php.. EPSS estimates a 16.35% chance of exploitation in the next 30 days.

Description

Multiple directory traversal vulnerabilities in TerraMaster TOS <= 4.2.06 allow remote authenticated attackers to read, edit or delete any file within the filesystem via the (1) filename parameter to /tos/index.php?editor/fileGet, Event parameter to /include/ajax/logtable.php, or opt parameter to /include/core/index.php.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

16.35%

96.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-22

Affected Software

Vendor	Product	Versions
Terra-Master	Tos	<= 4.2.06

References

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

Timeline

Published: Dec 24, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-28187?

How severe is CVE-2020-28187?

CVE-2020-28187 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 16.35% probability of exploitation in the next 30 days.

How do I fix CVE-2020-28187?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-28187?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST