Description
Nextcloud server is a self hosted personal cloud system. In affected versions OAuth codes did not expire. When an attacker would get access to an authorization code they could authenticate at any time using the code. As of version 28.0.0 OAuth codes are invalidated after 10 minutes and will no longer be authenticated. To exploit this vulnerability an attacker would need to intercept an OAuth code from a user session. It is recommended that the Nextcloud Server is upgraded to 28.0.0. There are no known workarounds for this vulnerability.
References (4)
Core 4
Core References
Mailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/[email protected]/message/S6PN4GVJ5TZUC6WSG4X3ZA3AMPBEKNAX/
Vendor Advisory x_refsource_confirm
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-wppc-f5g8-vx36
Patch, Vendor Advisory x_refsource_misc
https://github.com/nextcloud/server/pull/40766
Permissions Required, Third Party Advisory x_refsource_misc
https://hackerone.com/reports/1784162
Scores
CVSS v3
3.0
EPSS
0.0045
EPSS Percentile
35.7%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-613
Status
published
Products (1)
nextcloud/nextcloud_server
< 28.0.0
Published
Jan 18, 2024
Tracked Since
Feb 18, 2026