Auth bypass in Nextcloud End-To-End Encryption
CVE-2021-22906
Nextcloud End-to-End Encryption before 1.5.3, 1.6.3 and 1.7.1 suffers from a denial of service vulnerability due to permitting any authenticated users to lock files of other users.
Vulnerability class: DoS (Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.007 (52.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 52nd percentile — 52.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000
Affected products
- Nextcloud End-To-End Encryption
- Nextcloud End-To-End Encryption — versions Fixed in 1.5.3, 1.6.3, 1.7.1
Weakness classification (CWE)
References
- hackerone.com/reports/1189174 (Exploit, Third Party Advisory, Issue Tracking)
- github.com/nextcloud/security-advisories/security/advisories/GHSA-3829-45wm-ww36 (Third Party Advisory)
Frequently asked questions
- What is CVE-2021-22906?
- CVE-2021-22906 is a medium-severity vulnerability in Nextcloud End-To-End Encryption, classified under Uncontrolled Resource Consumption. CVSS score: 6.5/10. Published 2021-06-11.
- How severe is CVE-2021-22906?
- Medium severity. CVSS v3 base score is 6.5 out of 10.