What is CVE-2020-2503?

CVE-2020-2503 is a critical-severity vulnerability in Qnap Qes, classified under Cross-site Scripting. CVSS score: 9.0/10. Published 2020-12-24.

How severe is CVE-2020-2503?

Critical severity. CVSS v3 base score is 9.0 out of 10.

XSS in Qnap Qes

CVE-2020-2503

If exploited, this stored cross-site scripting vulnerability could allow remote attackers to inject malicious code in File Station. QNAP has already fixed these issues in QES 2.1.1 Build 20201006 and later.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.008 (51.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H.

Affected products

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

Weakness classification (CWE)

CWE-79 — Cross-site Scripting
CWE-80 — Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
CWE-749

References

security@qnapsecurity.com.tw (x_refsource_MISC, Vendor Advisory)

Frequently asked questions

What is CVE-2020-2503?: CVE-2020-2503 is a critical-severity vulnerability in Qnap Qes, classified under Cross-site Scripting. CVSS score: 9.0/10. Published 2020-12-24.
How severe is CVE-2020-2503?: Critical severity. CVSS v3 base score is 9.0 out of 10.