Risk | Low |
Patch available | YES |
Number of vulnerabilities | 1 |
CVE-ID | CVE-2021-39220 |
CWE-ID | CWE-200 |
Exploitation vector | Network |
Public exploit | N/A |
Vulnerable software |
Nextcloud Mail Web applications / Modules and components for CMS |
Vendor | Nextcloud |
Security Bulletin
This security bulletin contains one low risk vulnerability.
EUVDB-ID: #VU57650
Risk: Low
CVSSv4.0: 1.1 [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 - Exposure of sensitive information to an unauthorized actor
Exploit availability: No
DescriptionThe 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.
MitigationInstall updates from vendor's website.
Vulnerable software versionsNextcloud Mail: 1.10.0 - 1.10.3
CPE2.3https://github.com/nextcloud/mail/pull/5470
https://hackerone.com/reports/1308147
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-6q9v-wm8r-rcv5
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.