CVE-2020-8235 Missing authorization in Nextcloud Deck app
An attacker can view all attachments in Nextcloud Deck due to missing access control checks on object references.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2020-8235?
CVE-2020-8235 is a medium-severity missing authorization vulnerability in Nextcloud Deck app, published on 5 Oct 2020. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Missing access control in Nextcloud Deck 1.0.4 caused an insecure direct object reference allowing an attacker to view all attachments.
Weakness: CWE-639
Which versions are affected by CVE-2020-8235?
It affects 1 product.
Products include Nextcloud Deck.
How do I fix CVE-2020-8235?
No fix has been published for CVE-2020-8235 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2020-8235 being exploited?
There is no known exploitation of CVE-2020-8235 in the wild and no public exploit code.
Other vulnerabilities in Nextcloud Deck app
- CVE-2021-39225 Missing permission check on Deck API
- CVE-2020-8182 Missing authorization in Nextcloud Deck
- CVE-2021-37631 Circle can be accessed by non-Circle members in Nextcloud Deck
- CVE-2021-22913 Information disclosure in Nextcloud Deck
- CVE-2023-22469 Nextcloud Deck card vulnerable to data leak to unauthorized users via reference preview cache
Sources
Also known as GHSA-crm5-43pc-vrcg.