CVE-2020-8139
MEDIUMCVSS 6.5/10EPSS 1.54%
Last modified
CVE-2020-8139 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. A missing access control check in Nextcloud Server < 18.0.1, < 17.0.4, and < 16.0.9 causes hide-download shares to be downloadable when appending /download to the URL.. EPSS estimates a 1.54% chance of exploitation in the next 30 days.
Description
A missing access control check in Nextcloud Server < 18.0.1, < 17.0.4, and < 16.0.9 causes hide-download shares to be downloadable when appending /download to the URL.
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Nextcloud | Nextcloud Server | >= 16.0.0, < 16.0.9 |
| Nextcloud | Nextcloud Server | >= 17.0.0, < 17.0.4 |
| Nextcloud | Nextcloud Server | >= 18.0.0, < 18.0.1 |
| Fedoraproject | Fedora | 32 |
References
- https://hackerone.com/reports/788257Permissions Required
- https://nextcloud.com/security/advisory/?id=NC-SA-2020-015Vendor Advisory
- https://hackerone.com/reports/788257Permissions Required
- https://nextcloud.com/security/advisory/?id=NC-SA-2020-015Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2020-8139?
A missing access control check in Nextcloud Server < 18.0.1, < 17.0.4, and < 16.0.9 causes hide-download shares to be downloadable when appending /download to the URL.
How severe is CVE-2020-8139?
CVE-2020-8139 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 1.54% probability of exploitation in the next 30 days.
How do I fix CVE-2020-8139?
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-2020-8139?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST