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CVE-2020-2497

21
FAUCET Score

CVE-2020-2497 is a cross-site scripting (XSS) vulnerability affecting QNAP QTS and QuTS hero operating systems, allowing remote attackers to inject malicious code into System Connection Logs. This medium-severity vulnerability (CVSS 6.1) has a network attack vector, low attack complexity, and requires user interaction, potentially leading to limited confidentiality and integrity impacts. While there is no known active exploitation, public exploit code, or Metasploit modules, the vulnerability has received some community discussion and media coverage. QNAP has released patches in various QTS and QuTS hero versions to address this issue.

Impacted Technologies

VendorProductVersion(s)CPE
< 4.5.1.1472CPE matchmatch criteria
cpe:2.3:o:qnap:quts_hero:*:*:*:*:*:*:*:*
< 4.5.1.1456CPE matchmatch criteria
cpe:2.3:o:qnap:qts:*:*:*:*:*:*:*:*
< 4.4.3.1354CPE matchmatch criteria
cpe:2.3:o:qnap:qts:*:*:*:*:*:*:*:*
< 4.3.6.1333CPE matchmatch criteria
cpe:2.3:o:qnap:qts:*:*:*:*:*:*:*:*
< 4.3.4.1368CPE matchmatch criteria
cpe:2.3:o:qnap:qts:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.1MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
2.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.97%
Probability of exploitation in next 30 days
EPSS Percentile
58.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0097 is in the 71st percentile among its peer group of 26,234 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

qnap.com / en/security-advisory/qsa-20-12
Vendor Advisory