CVE-2017-0887

Q: How do I fix CVE-2017-0887?

Upgrade nextcloud server to 10.0.2 or later.

Q: Is CVE-2017-0887 being actively exploited?

Not that we know of. CVE-2017-0887 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.89% is the estimated probability that it will be exploited in the next 30 days. That is higher than 56% of all scored CVEs.

Q: How severe is CVE-2017-0887?

CVE-2017-0887 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-2017-0887 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

Nextcloud Server before 9.0.55 and 10.0.2 suffers from a bypass in the quota limitation. Due to not properly sanitizing values provided by the `OC-Total-Length` HTTP header an authenticated adversary may be able to exceed their configured user quota. Thus using more space than allowed by the administrator.

CWE-807 CWE-20Improper Input Validation

How to fix

Remediation Available

nextcloud serverNVD

Affected:>= 10.0.0, < 10.0.2Fixed in:10.0.2CVE-2017-0887derived 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

ConfidentialityNone

IntegrityLow

AvailabilityNone

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

Exploit Intelligence

0.89%probability of exploitation in 30 days

56thpercentile

Moderate risk: more likely to be exploited than 56% of all known CVEs.

References

Patch1

nextcloud.com

Third-Party Advisory1

hackerone.com

Related Vulnerabilities

Other CWE-807 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2026-34486	High	7.5	81%	KEV	Fix
CVE-2026-21509	High	7.8	72%	KEV	Fix
CVE-2024-13974	High	8.1	6.7%	-	Fix
CVE-2021-41129	High	8.1	1.8%	-	Fix
CVE-2026-21514	High	7.8	1.5%	KEV	-
CVE-2025-49827	Critical	9.8	1.4%	-	Fix

Common questions

How do I fix CVE-2017-0887?

Upgrade nextcloud server to 10.0.2 or later.

Is CVE-2017-0887 being actively exploited?

Not that we know of. CVE-2017-0887 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.89% is the estimated probability that it will be exploited in the next 30 days. That is higher than 56% of all scored CVEs.

How severe is CVE-2017-0887?

CVE-2017-0887 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-2017-0887 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 2026-05-13.