Vulnerability · Published Mar 3, 2021 · Assigned by hackerone
CVE-2021-22877
Medium 6.5
In plain English
A medium-severity improper access control in Nextcloud Server. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.7% (higher than 77% of all known vulnerabilities).
Severity (CVSS NVD)6.5Medium
Exploit odds (30 days)1.7%top 22.9% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official 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 products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| n/a | Nextcloud Server | Fixed in 20.0.6 |
Weakness: CWE-284
References
- https://hackerone.com/reports/1061591 x_refsource_MISC
- https://nextcloud.com/security/advisory/?id=NC-SA-2021-004 x_refsource_MISC
- https://github.com/nextcloud/server/issues/24600 x_refsource_MISC
- https://github.com/nextcloud/server/pull/25224 x_refsource_MISC
- FEDORA-2021-eac0e52f88 vendor-advisory, x_refsource_FEDORA