CVE-2025-66548
3.3 · LOWOverview
CVE-2025-66548 is a low-severity vulnerability affecting nextcloud deck. It was published on December 5, 2025 and has a CVSS 3.1 base score of 3.3 (LOW).
This vulnerability has a CVSS 3.1 base score of 3.3, rated LOW. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.
Technical 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.
Remediation
Check the references section for vendor advisories and patches from nextcloud. Update deck to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| nextcloud | deck | >= 0, < 1.12.7 | Affected |
Frequently Asked Questions
What is CVE-2025-66548?
CVE-2025-66548 is a low-severity vulnerability affecting nextcloud deck. It was published on December 5, 2025 and has a CVSS 3.1 base score of 3.3 (LOW).
How severe is CVE-2025-66548?
This vulnerability has a CVSS 3.1 base score of 3.3, rated LOW. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2025-66548?
Check the references section for vendor advisories and patches from nextcloud. Update deck to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2025-66548?
CyberStrike's AI-powered security agents can automatically detect CVE-2025-66548 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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