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CVE-2020-2491

21
FAUCET Score

CVE-2020-2491 is a cross-site scripting (XSS) vulnerability in QNAP Photo Station, allowing remote attackers to inject malicious code. This affects various versions of Photo Station across QTS 4.2.6 through 4.5.1. With a CVSS score of 6.1 (Medium), it has a network attack vector, low attack complexity, and requires user interaction, potentially leading to low impact on confidentiality and integrity. While not actively exploited in the wild and lacking public exploit code, it has received some community discussion and media coverage, indicating a degree of awareness.

Impacted Technologies

VendorProductVersion(s)CPE
< 6.0.12CPE matchmatch criteria
cpe:2.3:a:qnap:photo_station:*:*:*:*:*:*:*:*
< 5.7.12CPE matchmatch criteria
cpe:2.3:a:qnap:photo_station:*:*:*:*:*:*:*:*
< 5.7.13CPE matchmatch criteria
cpe:2.3:a:qnap:photo_station:*:*:*:*:*:*:*:*
< 5.4.10CPE matchmatch criteria
cpe:2.3:a:qnap:photo_station:*:*:*:*:*:*:*:*
< 5.2.11CPE matchmatch criteria
cpe:2.3:a:qnap:photo_station:*:*:*:*:*:*:*:*

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
0.98%
Probability of exploitation in next 30 days
EPSS Percentile
58.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0098 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-20-15
Vendor Advisory