4 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:L/Au:S/C:P/I:N/A:N
8.1 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
0.001 Low
EPSS
Percentile
39.0%
If a user was able to reuse an earlier used username, they could get access to any chat message sent to the previous user with this username.
It is recommended that the Nextcloud Talk App is upgraded to 11.2.2 or 11.3.0
Don’t allow users to choose usernames themselves. This is the default behaviour of Nextcloud, but some user providers may allow doing so. (e.g. the registration app)
If you have any questions or comments about this advisory:
CPE | Name | Operator | Version |
---|---|---|---|
nextcloud talk | lt | 11.2.2 | |
nextcloud talk | lt | 11.3.0 |
4 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:L/Au:S/C:P/I:N/A:N
8.1 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
0.001 Low
EPSS
Percentile
39.0%