CVE-2022-31131

Ownership check missing when updating or deleting mail attachments in Nextcloud mail

MEDIUM
4.3
CVSS Score
Published: July 6, 2022 at 05:55 PM UTC
Updated: June 17, 2026 at 04:44 AM UTC
2 products affected across 1 vendorNextcloud MailMail

Using security-advisories by nextcloud?

Get instant alerts when new vulnerabilities affect security-advisories - before attackers find them.

Real-time alertsTrack your software stackFree plan available
Severity
MEDIUM4.3
Exploit prediction
EPSS 0.8%
SSVC
PoC

Description

Nextcloud mail is a Mail app for the Nextcloud home server product. Versions of Nextcloud mail prior to 1.12.2 were found to be missing user account ownership checks when performing tasks related to mail attachments. Attachments may have been exposed to incorrect system users. It is recommended that the Nextcloud Mail app is upgraded to 1.12.2. There are no known workarounds for this issue. ### Workarounds No workaround available ### References * [Pull request](https://github.com/nextcloud/mail/pull/6600) * [HackerOne](https://hackerone.com/reports/1579820) ### For more information If you have any questions or comments about this advisory: * Create a post in [nextcloud/security-advisories](https://github.com/nextcloud/security-advisories/discussions) * Customers: Open a support ticket at [support.nextcloud.com](https://support.nextcloud.com)

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 1.12.2
Affected range stops below 1.12.2, so it looks safe — our inference, not a vendor statement
Mail· Nextcloudnextcloud-app
80%
v < 1.12.2
Affected range stops below 1.12.2, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (3)

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-287CWE-639

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Free plan, no card