CVE-2019-15621
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.
Does this matter?
Lower severity and a low EPSS score (1.06%). Track it; it rarely justifies an emergency change on its own.
Description
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.
- CVSS 3.1
- 6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
- EPSS
- 1.06% probability · 64th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-281
- Affected
- nextcloud/nextcloud server
- Source
- support@hackerone.com
EPSS 1.1% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- 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
- 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
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.