CVE-2020-8117

Q: How do I fix CVE-2020-8117?

Upgrade nextcloud server to 14.0.4 or later.

Q: Is CVE-2020-8117 being actively exploited?

Not that we know of. CVE-2020-8117 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.71% is the estimated probability that it will be exploited in the next 30 days. That is higher than 50% of all scored CVEs.

Q: How severe is CVE-2020-8117?

CVE-2020-8117 has a CVSS v3 base score of 4.3, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

Q: What does CVE-2020-8117 affect?

Published advisories record a fix for nextcloud server (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

MEDIUM

4.3

CVSS v3

NVD

Description

Improper preservation of permissions in Nextcloud Server 14.0.3 causes the event details to be leaked when sharing a non-public event.

CWE-280Improper Handling of Insufficient Permissions CWE-281

How to fix

Remediation Available

nextcloud serverNVD

Affected:>= 14.0.0, < 14.0.4Fixed in:14.0.4CVE-2020-8117derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityNone

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Exploit Intelligence

0.71%probability of exploitation in 30 days

50thpercentile

Moderate risk: more likely to be exploited than 50% of all known CVEs.

References

Vendor Advisory1

nextcloud.com

Other references1

hackerone.com

Related Vulnerabilities

Other CWE-280 (Improper Handling of Insufficient Permissions) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-24116	Critical	9.8	28%	-	-
CVE-2026-20817	High	7.8	5.3%	-	Fix
CVE-2020-8219	High	7.2	2.2%	-	-
CVE-2012-4550	Medium	5.3	2.1%	-	-
CVE-2020-26195	Medium	5.3	1.8%	-	-
CVE-2021-38312	High	7.1	1.3%	-	-

Common questions

How do I fix CVE-2020-8117?

Upgrade nextcloud server to 14.0.4 or later.

Is CVE-2020-8117 being actively exploited?

Not that we know of. CVE-2020-8117 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.71% is the estimated probability that it will be exploited in the next 30 days. That is higher than 50% of all scored CVEs.

How severe is CVE-2020-8117?

CVE-2020-8117 has a CVSS v3 base score of 4.3, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2020-8117 affect?

Published advisories record a fix for nextcloud server (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.