Improper access control checks for share expiration date (NC-SA-2019-002)
12th April 2019
Risk level: Low
CVSS v3 Base Score: 4.8 (AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N)
HackerOne report: 447494
A missing check could give recipient the possibility to extend the expiration date of a share they received.
- Nextcloud Server < 15.0.0 (CVE assignment pending)
- Nextcloud Server < 14.0.4 (CVE assignment pending)
- Nextcloud Server < 13.0.8 (CVE assignment pending)
- Nextcloud Server < 12.0.13 (CVE assignment pending)
The error has been fixed.
It is recommended that all instances are upgraded to Nextcloud 15.0.0, Nextcloud 14.0.4, Nextcloud 13.0.8 or 12.0.13.
The Nextcloud team thanks the following people for their research and responsible disclosure of the above advisory:
This advisory is licensed CC BY-SA 4.0.