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CVE-2020-8227

MEDIUM
6.8
CVSS Score
Published: August 21, 2020 at 08:33 PM UTC
Updated: June 17, 2026 at 03:26 AM UTC
2 products affected across 2 vendorsDesktopDesktop· also runs on 1 platform

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Severity
MEDIUM6.8
Exploit prediction
EPSS 26%

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.

Affected

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

Desktop· Nextcloudnextcloud-app
95%
v < 2.6.5
Affected range stops below 2.6.5, so it looks safe — our inference, not a vendor statement
linux-linux-kernel (environment)
Desktop· Spiceworks
60%
2.6.5

Runs on — not affected

The affected product only carries this flaw when running on these platforms. The platforms themselves are not vulnerable.

Remediation

No guide yet

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

Patch and advisory references

References (3)

x_refsource_MISCExploitThird Party Advisory
Source: [email protected]
https://hackerone.com/reports/590319
x_refsource_MISCBroken LinkExploitVendor Advisory
Source: [email protected]
https://nextcloud.com/security/advisory/?id=NC-SA-2020-032
Vendor Advisoryx_refsource_GENTOOThird Party Advisory
Source: [email protected]
https://security.gentoo.org/glsa/202009-09

CVSS

6.8MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
HIGH
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-22

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