CVE-2021-22877
3Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackepss 1.7%
exploitation probability
1.7%top 24% of all CVEs
observed exploitation
nono source reports it
A missing user check in Nextcloud prior to 20.0.6 inadvertently populates a user's own credentials for other users external storage configuration when not already configured yet.
Affected products
n/a · Nextcloud ServerReferences
https://github.com/nextcloud/server/issues/24600https://github.com/nextcloud/server/pull/25224https://hackerone.com/reports/1061591https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L6BO6P6MP2MOWA6PZRXX32PLWPXN5O4S/https://nextcloud.com/security/advisory/?id=NC-SA-2021-004