CVE-2020-8139
First published: Fri Mar 20 2020(Updated: )
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.
Credit: support@hackerone.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Nextcloud Server | >=16.0.0<16.0.9 | |
| Nextcloud Server | >=17.0.0<17.0.4 | |
| Nextcloud Server | >=18.0.0<18.0.1 | |
| Red Hat Fedora | =32 |
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Reference Links
- https://hackerone.com/reports/788257
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/KC6HLX5SG4PZO6Y54D2LFJ4ATG76BKOP/
- https://nextcloud.com/security/advisory/?id=NC-SA-2020-015
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KC6HLX5SG4PZO6Y54D2LFJ4ATG76BKOP/
Frequently Asked Questions
What is the severity of CVE-2020-8139?
CVE-2020-8139 is classified as a medium severity vulnerability.
How do I fix CVE-2020-8139?
To fix CVE-2020-8139, upgrade Nextcloud Server to version 16.0.9, 17.0.4, or 18.0.1 or higher.
What exploit does CVE-2020-8139 allow?
CVE-2020-8139 allows unauthorized access to hide-download shares by appending /download to the URL.
Which versions of Nextcloud Server are affected by CVE-2020-8139?
CVE-2020-8139 affects Nextcloud Server versions earlier than 16.0.9, 17.0.4, and 18.0.1.
What is the impact of CVE-2020-8139?
The impact of CVE-2020-8139 is that sensitive files can be downloaded by unauthorized users.
- agent/weakness
- agent/type
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- agent/references
- agent/severity
- agent/author
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- agent/event
- agent/first-publish-date
- agent/source
- agent/softwarecombine
- agent/tags
- collector/nvd-index
- agent/software-canonical-lookup-request
- vendor/nextcloud
- canonical/nextcloud server
- version/nextcloud server/16.0.0
- version/nextcloud server/17.0.0
- version/nextcloud server/18.0.0
- vendor/fedoraproject
- canonical/red hat fedora
- version/red hat fedora/32