Information disclosure in Nextcloud Mail - CVE-2021-39220
Published: October 26, 2021
Vulnerability identifier: #VU57650
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2021-39220
CWE-ID: CWE-200
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Nextcloud
Affected software:
Nextcloud Mail
Nextcloud Mail
Detailed vulnerability description
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to the affected application does by default not render images in emails to not leak the read state or user IP. A remote authenticated attacker can gain unauthorized access to sensitive information on the system.
How to mitigate CVE-2021-39220
Install updates from vendor's website.