CVE-2025-66548
Last modified
CVE-2025-66548 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. Nextcloud Deck is a kanban style organization tool aimed at personal planning and project organization for teams integrated with Nextcloud. Prior to 1.12.7, 1.14.4, and 1.15.1, file extension can be spoofed by using RTLO characters, tricking users into download files with a different extension than what is displayed. EPSS estimates a 0.13% chance of exploitation in the next 30 days.
Description
Nextcloud Deck is a kanban style organization tool aimed at personal planning and project organization for teams integrated with Nextcloud. Prior to 1.12.7, 1.14.4, and 1.15.1, file extension can be spoofed by using RTLO characters, tricking users into download files with a different extension than what is displayed. This vulnerability is fixed in 1.12.7, 1.14.4, and 1.15.1.
Metrics
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Nextcloud | Deck | < 1.12.7 |
| Nextcloud | Deck | >= 1.14.0, < 1.14.4 |
| Nextcloud | Deck | >= 1.15.0, < 1.15.1 |
References
- https://github.com/nextcloud/deck/pull/6671Issue Tracking
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-xjvq-xvr7-xpg6Patch, Vendor Advisory
- https://hackerone.com/reports/2326618Permissions Required, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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