VulnerabilityModified
CVE-2021-22877
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.
MEDIUM 6.5EPSS 1.69%
Does this matter?
Lower severity and a low EPSS score (1.69%). Track it; it rarely justifies an emergency change on its own.
Description
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.
- CVSS 3.1
- 6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
- EPSS
- 1.69% probability · 76th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-284, CWE-862
- Affected
- nextcloud/nextcloud server · fedoraproject/fedora
- Source
- support@hackerone.com
References
- https://github.com/nextcloud/server/issues/24600Exploit, Issue Tracking, Patch, Third Party Advisory
- https://github.com/nextcloud/server/pull/25224Patch, Third Party Advisory
- https://hackerone.com/reports/1061591Issue Tracking, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L6BO6P6MP2MOWA6PZRXX32PLWPXN5O4S/
- https://nextcloud.com/security/advisory/?id=NC-SA-2021-004Broken Link, Vendor Advisory
- https://github.com/nextcloud/server/issues/24600Exploit, Issue Tracking, Patch, Third Party Advisory
- https://github.com/nextcloud/server/pull/25224Patch, Third Party Advisory
- https://hackerone.com/reports/1061591Issue Tracking, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L6BO6P6MP2MOWA6PZRXX32PLWPXN5O4S/
- https://nextcloud.com/security/advisory/?id=NC-SA-2021-004Broken Link, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.