Vulnerability · Published Jun 1, 2021 · Assigned by GitHub_M
CVE-2021-32655Files Drop public link can be added as federated share
Low 3.5
In plain English
A low-severity security flaw in security-advisories from nextcloud. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.0% (higher than 64% of all known vulnerabilities).
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| nextcloud | security-advisories | < 19.0.11>= 20.0.0, < 20.0.10>= 21.0.0, < 21.0.2 |
Weakness: CWE-241 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N
References
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-grph-cm44-p3jv x_refsource_CONFIRM
- https://hackerone.com/reports/1167929 x_refsource_MISC
- GLSA-202208-17 vendor-advisory, x_refsource_GENTOO