CVE-2021-32655
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.
Does this matter?
Lower severity and a low EPSS score (1.03%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 3.5 LOWCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N
- EPSS
- 1.03% probability · 64th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-241
- Affected
- nextcloud/nextcloud server
- Source
- security-advisories@github.com
EPSS 1.0% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-grph-cm44-p3jvThird Party Advisory
- https://hackerone.com/reports/1167929Permissions Required, Third Party Advisory
- https://security.gentoo.org/glsa/202208-17Third Party Advisory
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-grph-cm44-p3jvThird Party Advisory
- https://hackerone.com/reports/1167929Permissions Required, Third Party Advisory
- https://security.gentoo.org/glsa/202208-17Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.