Nextcloud Calendar is a calendar app for Nextcloud. Prior to 4.7.17 and 5.2.4, when a malicious user creates a calendar event with a crafted attachment that links to a download link of a file on the same Nextcloud server, the file would be downloaded without the user confirming the action. This vulnerability is fixed in 4.7.17 and 5.2.4.
Metrics
Affected Vendors & Products
References
History
Fri, 05 Dec 2025 21:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Nextcloud
Nextcloud calendar |
|
| Vendors & Products |
Nextcloud
Nextcloud calendar |
Fri, 05 Dec 2025 19:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
Fri, 05 Dec 2025 17:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Nextcloud Calendar is a calendar app for Nextcloud. Prior to 4.7.17 and 5.2.4, when a malicious user creates a calendar event with a crafted attachment that links to a download link of a file on the same Nextcloud server, the file would be downloaded without the user confirming the action. This vulnerability is fixed in 4.7.17 and 5.2.4. | |
| Title | Nextcloud Calendar attachments of local files are offered to downloaded | |
| Weaknesses | CWE-241 | |
| References |
| |
| Metrics |
cvssV3_1
|
Status: PUBLISHED
Assigner: GitHub_M
Published: 2025-12-05T16:56:44.680Z
Updated: 2025-12-05T18:41:24.347Z
Reserved: 2025-12-04T15:57:22.034Z
Link: CVE-2025-66550
Updated: 2025-12-05T18:39:44.289Z
Status : Received
Published: 2025-12-05T17:16:05.500
Modified: 2025-12-05T17:16:05.500
Link: CVE-2025-66550
No data.