Medium severity6.5NVD Advisory· Published Mar 3, 2021· Updated Jun 17, 2026

CVE-2021-22877

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Nextcloud/Server
cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:*
Range: <20.0.6
Fedoraproject/Fedora
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
Nextcloud/Nextcloudllm-fuzzy2 versions
<20.0.6+ 1 more
- (no CPE)range: <20.0.6
- (no CPE)range: Fixed in 20.0.6

Patches

Vulnerability mechanics

References

github.com/nextcloud/server/pull/25224nvdPatchThird Party Advisory
github.com/nextcloud/server/issues/24600nvdExploitIssue TrackingPatchThird Party Advisory
hackerone.com/reports/1061591nvdIssue TrackingThird Party Advisory
nextcloud.com/security/advisory/nvdBroken LinkVendor Advisory
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L6BO6P6MP2MOWA6PZRXX32PLWPXN5O4S/nvd

News mentions

No linked articles in our index yet.

cvss	0.423
epss	0.001
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000