Vulnerability in Nextcloud Deck
CVE-2025-66548
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, tricki…
EPSS: 0.001 (2.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 3.3 (Low). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.
Affected products
- Nextcloud Deck
- Nextcloud Security-advisories — versions >= 1.15.0-beta.1, < 1.15.1, >= 1.14.0-beta.1, < 1.14.4, < 1.12.7
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Patch, Vendor Advisory)
- security-advisories@github.com (x_refsource_MISC, Issue Tracking)
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (Permissions Required, x_refsource_MISC, Vendor Advisory)
Frequently asked questions
- What is CVE-2025-66548?
- CVE-2025-66548 is a low-severity vulnerability in Nextcloud Deck, classified under Improper Encoding or Escaping of Output. CVSS score: 3.3/10. Published 2025-12-05.
- How severe is CVE-2025-66548?
- Low severity. CVSS v3 base score is 3.3 out of 10.