Nextcloud Calendar is a calendar app for Nextcloud. Prior to 6.0.3, the Calendar app generates participant tokens for meeting proposals using a hash function, allowing an attacker to compute valid participant tokens, which allowed them to request details and submit dates in meeting proposals. The tokens are not purely random generated. This vulnerability is fixed in 6.0.3.
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History
Fri, 05 Dec 2025 21:00:00 +0000
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Nextcloud
Nextcloud calendar |
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Nextcloud
Nextcloud calendar |
Fri, 05 Dec 2025 17:15:00 +0000
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ssvc
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Fri, 05 Dec 2025 16:45:00 +0000
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| Description | Nextcloud Calendar is a calendar app for Nextcloud. Prior to 6.0.3, the Calendar app generates participant tokens for meeting proposals using a hash function, allowing an attacker to compute valid participant tokens, which allowed them to request details and submit dates in meeting proposals. The tokens are not purely random generated. This vulnerability is fixed in 6.0.3. | |
| Title | Nextcloud Calendar app used predictable proposal participant tokens | |
| Weaknesses | CWE-330 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: GitHub_M
Published: 2025-12-05T16:42:30.236Z
Updated: 2025-12-05T16:53:52.674Z
Reserved: 2025-12-03T15:28:02.991Z
Link: CVE-2025-66511
Updated: 2025-12-05T16:53:50.036Z
Status : Received
Published: 2025-12-05T17:16:04.797
Modified: 2025-12-05T17:16:04.797
Link: CVE-2025-66511
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