NextcloudGHSA-2R7Q-VFMV-79QFEvent create can create attachments that link to other websites
4.6 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
6.6 Medium
AI Score
Confidence
High
0.0004 Low
EPSS
Percentile
15.5%
Description
Impact
Authenticated users could create an event with manipulated attachment data leading to a bad redirect for participants when clicked.
Patches
It is recommended that the Nextcloud Calendar App is upgraded to 4.6.8 or 4.7.2
Workarounds
- Disable the calendar app
References
For more information
If you have any questions or comments about this advisory:
- Create a post in nextcloud/security-advisories
- Customers: Open a support ticket at portal.nextcloud.com
4.6 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
6.6 Medium
AI Score
Confidence
High
0.0004 Low
EPSS
Percentile
15.5%