CVE-2020-2506 QNAP Helpdesk Improper Access Control

Exploited in the wild High 7.3 Published 3 Feb 2021 Updated 21 Oct 2025

Attackers can exploit improper access control in QNAP Helpdesk to gain privileges or read sensitive information.

Exploited in the wild: Since 25 Mar 2022
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2020-2506?

CVE-2020-2506 is a high-severity missing authorization vulnerability in QNAP Systems Inc. Helpdesk, published on 3 Feb 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

The vulnerability have been reported to affect earlier versions of QTS. If exploited, this improper access control vulnerability could allow attackers to compromise the security of the software by gaining privileges, or reading sensitive information. This issue affects: QNAP Systems Inc. Helpdesk versions prior to 3.0.3.

Weakness: CWE-284

Which versions are affected by CVE-2020-2506?

It affects 1 product.

Products include Qnap Helpdesk.

How do I fix CVE-2020-2506?

No fix has been published for CVE-2020-2506 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 15 Apr 2022.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2020-2506 being exploited?

Yes. Attackers have exploited CVE-2020-2506 in the wild since at least 25 Mar 2022.

Sources

Also known as GHSA-vph4-5mf4-28v5.