CVE-2020-8223
MEDIUMCVSS 6.5/10EPSS 1.45%
Last modified
CVE-2020-8223 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. A logic error in Nextcloud Server 19.0.0 caused a privilege escalation allowing malicious users to reshare with higher permissions than they got assigned themselves.. EPSS estimates a 1.45% chance of exploitation in the next 30 days.
Description
A logic error in Nextcloud Server 19.0.0 caused a privilege escalation allowing malicious users to reshare with higher permissions than they got assigned themselves.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Nextcloud | Nextcloud Server | 19.0.0 |
| Fedoraproject | Fedora | 32 |
| Fedoraproject | Fedora | 33 |
References
- https://hackerone.com/reports/889243Exploit, Third Party Advisory
- https://nextcloud.com/security/advisory/?id=NC-SA-2020-029Vendor Advisory
- https://hackerone.com/reports/889243Exploit, Third Party Advisory
- https://nextcloud.com/security/advisory/?id=NC-SA-2020-029Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2020-8223?
A logic error in Nextcloud Server 19.0.0 caused a privilege escalation allowing malicious users to reshare with higher permissions than they got assigned themselves.
How severe is CVE-2020-8223?
CVE-2020-8223 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 1.45% probability of exploitation in the next 30 days.
How do I fix CVE-2020-8223?
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-2020-8223?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST