CVE-2021-22877
MEDIUM
6.5
CVSS Score
Published: March 3, 2021 at 05:39 PM UTC
Updated: June 17, 2026 at 03:37 AM UTC
2 products affected across 2 vendorsFedoraNextcloud/server
Using Nextcloud Server by N/A?
Get instant alerts when new vulnerabilities affect Nextcloud Server - before attackers find them.
Real-time alertsTrack your software stackFree plan available
Severity
MEDIUM6.5
Exploit prediction
EPSS 2%
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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
95%
Nextcloud/server· Nextcloudnextcloud-app
95%v < 20.0.6
Vendor states this is fixed in 20.0.6 (unaffected)
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
References (5)
x_refsource_MISCExploitIssue TrackingPatchThird Party Advisory
Source: [email protected]
https://github.com/nextcloud/server/issues/24600x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/nextcloud/server/pull/25224x_refsource_MISCIssue TrackingThird Party Advisory
Source: [email protected]
https://hackerone.com/reports/1061591Vendor Advisoryx_refsource_FEDORA
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L6BO6P6MP2MOWA6PZRXX32PLWPXN5O4S/x_refsource_MISCBroken LinkVendor Advisory
Source: [email protected]
https://nextcloud.com/security/advisory/?id=NC-SA-2021-004CVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- HIGH
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- HIGH
- Integrity
- HIGH
- Availability
- NONE
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-284CWE-862
Get alerted
Stop reading CVE feeds looking for your own stack
Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.
Free plan, no card