// For flags

CVE-2021-34359

Stored XSS Vulnerability in Proxy Server

Severity Score

5.4
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

A cross-site scripting (XSS) vulnerability has been reported to affect QNAP device running Proxy Server. If exploited, this vulnerability allows remote attackers to inject malicious code. We have already fixed this vulnerability in the following versions of Proxy Server: QTS 4.5.x: Proxy Server 1.4.2 ( 2021/12/30 ) and later

Se ha informado de una vulnerabilidad de tipo cross-site scripting (XSS) que afecta al dispositivo QNAP que ejecuta Proxy Server. Si es explotado, esta vulnerabilidad permite a atacantes remotos inyectar código malicioso. Ya hemos corregido esta vulnerabilidad en las siguientes versiones de Proxy Server: QTS 4.5.x: Proxy Server 1.4.2 ( 2021/12/30 ) y posteriores.

*Credits: Tony Martin, a security researcher
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None
Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
Required
Scope
Changed
Confidentiality
High
Integrity
Low
Availability
None
Attack Vector
Network
Attack Complexity
Medium
Authentication
Single
Confidentiality
None
Integrity
Partial
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2021-06-08 CVE Reserved
  • 2022-02-25 CVE Published
  • 2023-09-18 EPSS Updated
  • 2024-09-17 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CAPEC
References (1)
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Qnap
Search vendor "Qnap"
Nas Proxy Server
Search vendor "Qnap" for product "Nas Proxy Server"
< 1.4.2
Search vendor "Qnap" for product "Nas Proxy Server" and version " < 1.4.2"
-
Affected
in Qnap
Search vendor "Qnap"
Qts
Search vendor "Qnap" for product "Qts"
>= 4.5.1 <= 4.5.4
Search vendor "Qnap" for product "Qts" and version " >= 4.5.1 <= 4.5.4"
-
Safe