This improper access control vulnerability in Helpdesk allows attackers to get control of QNAP Kayako service.

published 2020-07-01 6y ago modified 2026-06-17 4mo ago also EUVD-2020-22293

cvss: 9.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.7%; EPSS 0.7% chance of exploitation in 30 days, percentile 55%
public exploits: 0; none known

This improper access control vulnerability in Helpdesk allows attackers to get control of QNAP Kayako service. Attackers can access the sensitive data on QNAP Kayako server with API keys. We have replaced the API key to mitigate the vulnerability, and already fixed the issue in Helpdesk 3.0.1 and later versions.

Patch / fix

fixed in 1

QNAP Systems Inc. Helpdesk 3.0.1

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Exploit prediction

0.75% chance of exploitation in the next 30 days, higher than 55% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
CNA	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	3.1	6.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
NVD	2.0	6.4	AV:N/AC:L/Au:N/C:P/I:P/A:N

Affected products

QNAP Systems Inc. Helpdesk

Classification

Weakness

CWE-284 Improper Access Control
CWE-321 Use of Hard-coded Cryptographic Key
CWE-798 Use of Hard-coded Credentials

References

qnap.com /zh-tw/security-advisory/qsa-20-03
vendor-advisory

Sources

CVE List CVE-2020-2500
NVD CVE-2020-2500

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