CVE-2020-8227
MEDIUMCVSS 6.8/10EPSS 22.45%
Last modified
CVE-2020-8227 is a medium-severity vulnerability rated 6.8/10 on the CVSS scale. Missing sanitization of a server response in Nextcloud Desktop Client 2.6.4 for Linux allowed a malicious Nextcloud Server to store files outside of the dedicated sync directory.. EPSS estimates a 22.45% chance of exploitation in the next 30 days.
Description
Missing sanitization of a server response in Nextcloud Desktop Client 2.6.4 for Linux allowed a malicious Nextcloud Server to store files outside of the dedicated sync directory.
Metrics
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Nextcloud | Desktop | < 2.6.5 |
References
- https://hackerone.com/reports/590319Exploit, Third Party Advisory
- https://nextcloud.com/security/advisory/?id=NC-SA-2020-032Broken Link, Exploit, Vendor Advisory
- https://security.gentoo.org/glsa/202009-09Third Party Advisory
- https://hackerone.com/reports/590319Exploit, Third Party Advisory
- https://nextcloud.com/security/advisory/?id=NC-SA-2020-032Broken Link, Exploit, Vendor Advisory
- https://security.gentoo.org/glsa/202009-09Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2020-8227?
Missing sanitization of a server response in Nextcloud Desktop Client 2.6.4 for Linux allowed a malicious Nextcloud Server to store files outside of the dedicated sync directory.
How severe is CVE-2020-8227?
CVE-2020-8227 has a CVSS score of 6.8/10 (MEDIUM severity). The EPSS model estimates a 22.45% probability of exploitation in the next 30 days.
How do I fix CVE-2020-8227?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
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.
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Are you affected by CVE-2020-8227?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST