What is CVE-2023-34977?

CVE-2023-34977 is a medium-severity vulnerability in QNAP Video Station, classified under Cross-site Scripting. CVSS score: 4.6/10. Published 2023-10-13.

How severe is CVE-2023-34977?

Medium severity. CVSS v3 base score is 4.6 out of 10.

XSS in QNAP Video Station

CVE-2023-34977

A cross-site scripting (XSS) vulnerability has been reported to affect Video Station. If exploited, the vulnerability could allow authenticated users to inject malicious code via a network. We have already fixed the vulnerability in the following version: Video Station 5.7.0 ( 2023/07/27 ) and later

Vulnerability class: XSS (Cross-Site Scripting)

Published 2023-10-13 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.6 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.003 (20.4th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 20th percentile — 20.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

QNAP Video Station
QNAP Systems Inc. Video Station — versions 5.7.x

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

www.qnap.com/en/security-advisory/qsa-23-52 (Vendor Advisory)

Frequently asked questions

What is CVE-2023-34977?: CVE-2023-34977 is a medium-severity vulnerability in QNAP Video Station, classified under Cross-site Scripting. CVSS score: 4.6/10. Published 2023-10-13.
How severe is CVE-2023-34977?: Medium severity. CVSS v3 base score is 4.6 out of 10.