Medium severity · published Feb 4, 2020
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…
6.5
CVSS
1.1%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.1% · higher than 64% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NS
Nextcloud Server · Nextcloud
before 14.0.13; 15.0.0 before 15.0.9; 16.0.0 before 16.0.2 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-15621
CVE.org
https://www.cve.org/CVERecord?id=CVE-2019-15621
lists.opensuse.org
http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00019.html
lists.opensuse.org
http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00022.html
Permissions Required
https://hackerone.com/reports/619484
Vendor Advisory
https://nextcloud.com/security/advisory/?id=NC-SA-2020-012
More from Nextcloud Server
9.8
CVE-2023-49792
Nextcloud Server provides data storage for Nextcloud, an open source cloud platform
9.8
CVE-2023-48306
Nextcloud Server provides data storage for Nextcloud, an open source cloud platform
9.8
CVE-2021-32802
Nextcloud server is an open source, self hosted personal cloud
9.8
CVE-2021-32726
Nextcloud Server is a Nextcloud package that handles data storage
9.8
CVE-2021-22915
Nextcloud server before 19.0.11, 20.0.10, 21.0.2 is vulnerable to brute force attacks due to lack of inclusion of IPv6 subnets in rate-limiting considerations