CVE-2020-8182 Missing authorization in Nextcloud Deck
Attackers can reshare Nextcloud Deck boards with higher permissions than originally granted, leading to unauthorized access and modification.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2020-8182?
CVE-2020-8182 is a high-severity missing authorization vulnerability in Nextcloud Deck, published on 5 Oct 2020. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
Improper access control in Nextcloud Deck 0.8.0 allowed an attacker to reshare boards shared with them with more permissions than they had themselves.
Which versions are affected by CVE-2020-8182?
It affects 1 product.
Products include Nextcloud Deck.
How do I fix CVE-2020-8182?
No fix has been published for CVE-2020-8182 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-2020-8182 being exploited?
There is no known exploitation of CVE-2020-8182 in the wild and no public exploit code.
Other vulnerabilities in Nextcloud Deck
- CVE-2021-39225 Missing permission check on Deck API
- 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
- CVE-2025-66557 Nextcloud Deck app allowed user with "Can share" permission to modify permissions of other non-owners
Sources
Also known as GHSA-9fvc-qpfc-hjxh.