CVE-2021-34356

Name: CVE-2021-34356
Creator: NVD / NIST
Published: 2021-10-01T03:15:06.797+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 0.63%

Last modified Jun 17, 2026

CVE-2021-34356 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. A cross-site scripting (XSS) vulnerability has been reported to affect QNAP device running Photo Station. If exploited, this vulnerability allows remote attackers to inject malicious code. EPSS estimates a 0.63% chance of exploitation in the next 30 days.

Description

A cross-site scripting (XSS) vulnerability has been reported to affect QNAP device running Photo Station. If exploited, this vulnerability allows remote attackers to inject malicious code. We have already fixed this vulnerability in the following versions of Photo Station: Photo Station 6.0.18 ( 2021/09/01 ) and later

Metrics

CVSS 3.1

5.4/10

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

EPSS Probability

0.63%

45.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Qnap	Photo Station	< 6.0.18

References

https://www.qnap.com/en/security-advisory/qsa-21-41Mitigation, Vendor Advisory
https://www.qnap.com/en/security-advisory/qsa-21-41Mitigation, Vendor Advisory

Timeline

Published: Oct 1, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-34356?

How severe is CVE-2021-34356?

CVE-2021-34356 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.63% probability of exploitation in the next 30 days.

How do I fix CVE-2021-34356?

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-2021-34356?

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

Scan your code now

Source: NVD / NIST