Nextcloud: >> Nextcloud Server >> 15.0.2 Security Vulnerabilities
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 Score
3.5
EPSS Score
0.003
Published
2021-06-01
Nextcloud Server is a Nextcloud package that handles data storage. Nextcloud Server versions prior to 19.0.11, 20.0.10, or 21.0.2 send user IDs to the lookup server even if the user has no fields set to published. The vulnerability is patched in versions 19.0.11, 20.0.10, and 21.0.2; no workarounds outside the updates are known to exist.
CVSS Score
2.7
EPSS Score
0.003
Published
2021-06-01
A missing user check in Nextcloud prior to 20.0.6 inadvertently populates a user's own credentials for other users external storage configuration when not already configured yet.
CVSS Score
6.5
EPSS Score
0.005
Published
2021-03-03
Nextcloud Server prior to 20.0.6 is vulnerable to reflected cross-site scripting (XSS) due to lack of sanitization in `OC.Notification.show`.
CVSS Score
4.8
EPSS Score
0.004
Published
2021-03-03
Nextcloud Server prior to 20.0.0 stores passwords in a recoverable format even when external storage is not configured.
CVSS Score
6.7
EPSS Score
0.002
Published
2021-03-03
A missing link validation in Nextcloud Server before 20.0.2, 19.0.5, 18.0.11 allows execution of a stored XSS attack using Internet Explorer when saving a 'javascript:' URL in markdown format.
CVSS Score
5.4
EPSS Score
0.004
Published
2021-02-03
A missing input validation in Nextcloud Server before 20.0.2, 19.0.5, 18.0.11 allows users to store unlimited data in workflow rules causing load and potential DDoS on later interactions and usage with those rules.
CVSS Score
6.5
EPSS Score
0.012
Published
2021-01-26
A wrong check in Nextcloud Server 19 and prior allowed to perform a denial of service attack when resetting the password for a user.
CVSS Score
7.5
EPSS Score
0.005
Published
2021-01-26
Insufficient protection of the server-side encryption keys in Nextcloud Server 19.0.1 allowed an attacker to replace the public key to decrypt them later on.
CVSS Score
4.4
EPSS Score
0.002
Published
2020-11-16
Insufficient protection of the server-side encryption keys in Nextcloud Server 19.0.1 allowed an attacker to replace the encryption keys.
CVSS Score
8.1
EPSS Score
0.002
Published
2020-11-16