5.7

CVE-2021-28806: qnap systems inc. qts Cross-site Scripting

CVSS: 5.7v3.1MediumModified
Published 03-06-2021Last modified 16-09-2024
Open JSON

Vulnerability summary

CVE-2021-28806 is a medium (CVSS 5.7) Cross-site Scripting vulnerability in qnap systems inc. qts. EPSS estimates a 0.51% chance of exploitation in the next 30 days, higher than 41.9% of scored vulnerabilities.

Overall risk
23/100
0100
Low · default modelHow is this calculated?
CVSS score
5.7/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.51%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 03-06-2021
    PublishedVulnerability first disclosed.
  2. 16-09-2024
    Last modifiedVulnerability information updated.

Description

A DOM-based XSS vulnerability has been reported to affect QNAP NAS running QTS and QuTS hero. If exploited, this vulnerability allows attackers to inject malicious code. This issue affects: QNAP Systems Inc. QTS versions prior to 4.5.3.1652 Build 20210428. QNAP Systems Inc. QuTS hero versions prior to h4.5.2.1638 Build 20210414. QNAP Systems Inc. QuTScloud versions prior to c4.5.5.1656 Build 20210503. This issue does not affect: QNAP Systems Inc. QTS 4.3.6; 4.3.3.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

0.51%

Chance of exploitation in the next 30 days

Percentile

42%

Versus all other CVEs

30-day change

0.00 pp

From 0.51% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.51%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Qnap3 products
Qnap systems inc.3 products
  • qts≥ unspecified, < 4.5.3.1652 Build 20210428
  • quts hero≥ unspecified, < h4.5.2.1638 Build 20210414
  • qutscloud≥ unspecified, < c4.5.5.1656 Build 20210503

2 vendors · 6 products

References

1 links