SB2025120822 - Information Exposure Through an Error Message in Nextcloud Calendar
Published: December 8, 2025
Security Bulletin ID
SB2025120822
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Information Exposure Through an Error Message (CVE-ID: CVE-2025-66549)
CWE-ID: CWE-209 - Information Exposure Through an Error Message
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a remote user to gain access to potentially sensitive information.
The vulnerability exists due to an error within desktop client when attempting to lock a file inside a end-to-end encrypted directory. A remote administrator can gain unauthorized access to sensitive information on the system.
Remediation
Install update from vendor's website.