What is CVE-2020-2504?

CVE-2020-2504 is a medium-severity vulnerability in QNAP Qes, classified under Improper Input Validation. CVSS score: 5.8/10. Published 2020-12-24.

How severe is CVE-2020-2504?

Medium severity. CVSS v3 base score is 5.8 out of 10.

Path Traversal in QNAP Qes

CVE-2020-2504

If exploited, this absolute path traversal vulnerability could allow attackers to traverse files in File Station. QNAP has already fixed these issues in QES 2.1.1 Build 20201006 and later.

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

Published 2020-12-24 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.010 (62.3th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 62nd percentile — 62.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: +0.000

Affected products

QNAP Qes — versions 2.1.1
QNAP Systems Inc. Qes — versions unspecified

Weakness classification (CWE)

References

www.qnap.com/zh-tw/security-advisory/qsa-20-17 (Vendor Advisory)

Frequently asked questions

What is CVE-2020-2504?: CVE-2020-2504 is a medium-severity vulnerability in QNAP Qes, classified under Improper Input Validation. CVSS score: 5.8/10. Published 2020-12-24.
How severe is CVE-2020-2504?: Medium severity. CVSS v3 base score is 5.8 out of 10.