CVE-2020-2503

5.4 mediumEPSS 0.8%

Medium (5.4) in qnap qes. EPSS 0.8% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

5.4 medium

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

EPSS: 0.8% chance of exploitation in the next 30 days; higher than 56% of CVEs (scores of 2026-10-31)
CWEs: CWE-79, CWE-80, CWE-749
Published: 2020-12-24
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

qnap:qes

References

https://www.qnap.com/zh-tw/security-advisory/qsa-20-17
https://www.qnap.com/zh-tw/security-advisory/qsa-20-17

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