Home/CVE/Improper permissions preservation in Nextcloud Server 16.0.1 causes sharees to be able to reshare with write permissions
CVE

CVE-2019-15621

Improper permissions preservation in Nextcloud Server 16.0.1 causes sharees to be able to reshare with write permissions

Improper permissions preservation in Nextcloud Server 16.0.1 causes sharees to be able to reshare with write permissions when sharing the mount point of a share they received, as a public link.

MEDIUM · CVSS 6.5 EPSS 0.00115
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-281Improper Preservation of Permissions
▤

Affected Products & Versions

3
nextcloud server< 14.0.13
nextcloud server>= 15.0.0 and < 15.0.9
nextcloud server>= 16.0.0 and < 16.0.2
▣

Scoring & Timeline

6.5
MEDIUM · CVSS v3.1 · support@hackerone.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD04 Feb 2020 · 08:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
⚑

Vendor Advisories

2
suse-csafopenSUSE-SU-2020:0229-1
suse-csafopenSUSE-SU-2020:0220-1
🔗

References & Sources

4
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00019.html
http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00022.html
https://hackerone.com/reports/619484Permissions Required
https://nextcloud.com/security/advisory/?id=NC-SA-2020-012Vendor Advisory
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