CVE-2021-32655
Low
Description
Nextcloud Server is a Nextcloud package that handles data storage. In versions prior to 19.0.11, 20.0.10, and 21.0.2, an attacker is able to convert a Files Drop link to a federated share. This causes an issue on the UI side of the sharing user. When the sharing user opens the sharing panel and tries to remove the "Create" privileges of this unexpected share, Nextcloud server would silently grant the share read privileges. The vulnerability is patched in versions 19.0.11, 20.0.10 and 21.0.2. No workarounds are known to exist.
SeverityLow
CVSS3.5
Exploit probability—
Product
Nextcloud Server
PublishedJun 1, 2021
First seenJun 1, 2021
Weakness typeCWE-241CWE-241
How to fix
Update
- nextcloud nextcloud_server19.0.11, 20.0.10, 21.0.2 or later
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| nextcloud nextcloud_server | v < 19.0.11, 20.0.0 ≤ v < 20.0.10, 21.0.0 ≤ v < 21.0.2 | 19.0.11, 20.0.10, 21.0.2 |
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