CVE-2021-22877
MEDIUMCVSS 6.5/10EPSS 1.69%
Last modified
CVE-2021-22877 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. 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.. EPSS estimates a 1.69% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Nextcloud | Nextcloud Server | < 20.0.6 |
| Fedoraproject | Fedora | 34 |
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://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://nextcloud.com/security/advisory/?id=NC-SA-2021-004Broken Link, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is 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.
How severe is CVE-2021-22877?
CVE-2021-22877 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 1.69% probability of exploitation in the next 30 days.
How do I fix CVE-2021-22877?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
Are you affected by CVE-2021-22877?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST