SB2025120515 - Improper Encoding or Escaping of Output in Nextcloud Deck app
Published: December 5, 2025
Security Bulletin ID
SB2025120515
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Improper Encoding or Escaping of Output (CVE-ID: CVE-2025-66548)
The vulnerability allows a local user to compromise the target system.
The vulnerability exists due to improper encoding or escaping of output. A local user can spoof file extensions by using RTLO characters.
Remediation
Install update from vendor's website.