CVE-2023-39303
Last modified
CVE-2023-39303 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. An improper authentication vulnerability has been reported to affect several QNAP operating system versions. If exploited, the vulnerability could allow users to compromise the security of the system via a network. We have already fixed the vulnerability in the following versions: QTS 5.1.3.2578 build 20231110 and later QuTS hero h5.1.3.2578 build 20231110 and later QuTScloud c5.1.5.2651 and later . EPSS estimates a 0.47% chance of exploitation in the next 30 days.
Description
An improper authentication vulnerability has been reported to affect several QNAP operating system versions. If exploited, the vulnerability could allow users to compromise the security of the system via a network. We have already fixed the vulnerability in the following versions: QTS 5.1.3.2578 build 20231110 and later QuTS hero h5.1.3.2578 build 20231110 and later QuTScloud c5.1.5.2651 and later
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Qnap | Qts | 5.1.0.2348 | Build 20230325 |
| Qnap | Qts | 5.1.0.2399 | Build 20230515 |
| Qnap | Qts | 5.1.0.2418 | Build 20230603 |
| Qnap | Qts | 5.1.0.2444 | Build 20230629 |
| Qnap | Qts | 5.1.0.2466 | Build 20230721 |
| Qnap | Qts | 5.1.1.2491 | Build 20230815 |
| Qnap | Qts | 5.1.2.2533 | Build 20230926 |
| Qnap | Qts | 5.1.3.2578 | — |
| Qnap | Quts Hero | h5.1.0.2409 | Build 20230525 |
| Qnap | Quts Hero | h5.1.0.2424 | Build 20230609 |
| Qnap | Quts Hero | h5.1.0.2453 | Build 20230708 |
| Qnap | Quts Hero | h5.1.0.2466 | Build 20230721 |
| Qnap | Quts Hero | h5.1.1.2488 | Build 20230812 |
| Qnap | Quts Hero | h5.1.2.2534 | Build 20230927 |
| Qnap | Quts Hero | h5.1.3.2578 | — |
| Qnap | Qutscloud | c5.1.0.2498 | Build 20230822 |
References
- https://www.qnap.com/en/security-advisory/qsa-23-33Vendor Advisory
- https://www.qnap.com/en/security-advisory/qsa-23-33Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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