CVE-2021-34360

CSRF Bypass in Proxy Server

HIGH

8.8

CVSS Score

Published: May 26, 2022 at 07:20 AM UTC

Updated: June 17, 2026 at 03:55 AM UTC

4 products affected across 1 vendorNAS Proxy ServerQTSQuTS hero

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Severity

HIGH8.8

Exploit prediction

EPSS 0.5%

Description

A cross-site request forgery (CSRF) 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 QuTS hero h5.0.0: Proxy Server 1.4.3 ( 2022/01/18 ) and later QuTScloud c4.5.6: Proxy Server 1.4.2 ( 2021/12/30 ) and later

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

NAS Proxy Server · Qnap

95%

v < 1.4.2 ( 2021/12/30 )v < 1.4.3 ( 2022/01/18 )1.4.0 ≤ v < 1.4.21.4.0 ≤ v < 1.4.3

Affected range stops below 1.4.2, so it looks safe — our inference, not a vendor statement

Affected range stops below 1.4.2 ( 2021/12/30 ), so it looks safe — our inference, not a vendor statement

Affected range stops below 1.4.3, so it looks safe — our inference, not a vendor statement

Affected range stops below 1.4.3 ( 2022/01/18 ), so it looks safe — our inference, not a vendor statement

qnap-qts (environment) · qnap-quts-hero (environment) · qnap-qutscloud (environment)

QTS · Qnapdevice

80%

All versions

QuTS hero · Qnapdevice

80%

All versions

QuTScloud · Qnapdevice

80%

All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://www.qnap.com/en/security-advisory/qsa-22-18

References (1)

x_refsource_MISCVendor Advisory

Source: [email protected]

https://www.qnap.com/en/security-advisory/qsa-22-18

CVSS

8.8HIGH[email protected]

Attack Vector: NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: REQUIRED
Scope: UNCHANGED
Confidentiality: HIGH
Integrity: HIGH
Availability: HIGH

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-352

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