Event create can create attachments that link to other websites

Moderate

nickvergessen published GHSA-2r7q-vfmv-79qf

Jun 14, 2024

Package

Calendar (Nextcloud)

Affected versions

>= 4.3.0

Patched versions

4.6.8, 4.7.2

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

Severity

Moderate

4.6

/ 10

CVSS base metrics

Attack vector

Network

Attack complexity

Low

Privileges required

Low

User interaction

Required

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

None

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N