CVE-2020-2502Network attack vector

Browser script injection via undisclosed web input

Published Feb 17, 2021 · Updated Sep 16, 2024

Cross-site scripting in QNAP Photo Station before 6.0.11 allows remote attackers to inject malicious code through its web interface. QNAP has not published the affected request, input field, or missing output-encoding operation, so the precise code path is undisclosed. Exploitation requires user interaction and runs attacker-supplied script in another user's browser context, enabling browser-based data exposure or modification without interrupting the NAS service.

CVSS severity6.1
Medium
EPSS probability0.83%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in QNAP Photo Station before 6.0.11 allows remote attackers to inject malicious code through its web interface. QNAP has not published the affected request, input field, or missing output-encoding operation, so the precise code path is undisclosed. Exploitation requires user interaction and runs attacker-supplied script in another user's browser context, enabling browser-based data exposure or modification without interrupting the NAS service.

The record

CVE
CVE-2020-2502
Published
Feb 17, 2021
Updated
Sep 16, 2024
Vendor
Linn Products Limited
Product
Photo Station
Classifications
CWE-80, CWE-79, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 17, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified <6.0.11

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Linn Products Limited · Photo Stationversion=unspecified <6.0.11

Published CVSS scores

4.3NIST NVDAV:N/AC:M/Au:N/C:N/I:P/A:N
6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-80Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007Command and Scripting Interpreter: JavaScript

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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