Authorization bypass through user-controlled key in Nextcloud Mail
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2022-31131 |
| CWE-ID | CWE-639 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Nextcloud Mail Web applications / Modules and components for CMS |
| Vendor | Nextcloud |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
1) Authorization bypass through user-controlled key
EUVDB-ID: #VU65374
Risk: Medium
CVSSv3.1: 4.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L/E:U/RL:O/RC:C]
CVE-ID: CVE-2022-31131
CWE-ID:
CWE-639 - Authorization Bypass Through User-Controlled Key
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to bypass authentication process.
The vulnerability exists due to missing ownership check when updating or deleting mail attachments. A remote user can cause the attachment is unavailable for the given message in the outbox.
MitigationInstall updates from vendor's website.
Vulnerable software versionsNextcloud Mail: 1.0.0 - 1.12.1
External linkshttp://github.com/nextcloud/mail/pull/6600/commits/6dd2527be8d4f6788b449c8a8f5577628b990605
http://github.com/nextcloud/security-advisories/security/advisories/GHSA-xhv7-5mhv-299j
http://github.com/nextcloud/mail/pull/6600
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.
