CVE-2022-31118

Missing brute force protection on cloud federation sharing in Nextcloud Server

MEDIUM
5.3
CVSS Score
Published: August 4, 2022 at 04:50 PM UTC
Updated: June 17, 2026 at 04:44 AM UTC
1 product affected across 1 vendorNextcloud/server

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Severity
MEDIUM5.3
Exploit prediction
EPSS 0.8%
SSVC
No known exploit

Description

Nextcloud server is an open source personal cloud solution. In affected versions an attacker could brute force to find if federated sharing is being used and potentially try to brute force access tokens for federated shares (`a-zA-Z0-9` ^ 15). It is recommended that the Nextcloud Server is upgraded to 22.2.9, 23.0.6 or 24.0.2. Users unable to upgrade may disable federated sharing via the Admin Sharing settings in `index.php/settings/admin/sharing`.

Affected

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

v < 22.2.923.0.0 ≤ v < 23.0.624.0.0 ≤ v < 24.0.2
Affected range stops below 22.2.9, so it looks safe — our inference, not a vendor statement
Affected range stops below 23.0.6, so it looks safe — our inference, not a vendor statement
Affected range stops below 24.0.2, 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:

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

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

CVSS

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

Quick Info

StatusMODIFIED
CWE
CWE-770CWE-307

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