CVE-2022-29243

Improper input-size validation on the user new session name in Nextcloud Server

MEDIUM
4.3
CVSS Score
Published: May 31, 2022 at 04:15 PM UTC
Updated: June 17, 2026 at 04:39 AM UTC
1 product affected across 1 vendorNextcloud/server

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Severity
MEDIUM4.3
Exploit prediction
EPSS 2%
SSVC
No known exploit

Description

Nextcloud Server is the file server software for Nextcloud, a self-hosted productivity platform. Prior to versions 22.2.7 and 23.0.4, missing input-size validation of new session names allows users to create app passwords with long names. These long names are then loaded into memory on usage, resulting in impacted performance. Versions 22.2.7 and 23.0.4 contain a fix for this issue. There are currently no known workarounds available.

Affected

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

v < 22.2.723.0.0 < v < 23.0.4
Affected range stops below 22.2.7, so it looks safe — our inference, not a vendor statement
Affected range stops below 23.0.4, 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 (4)

x_refsource_MISCPatchThird Party Advisory
https://github.com/nextcloud/server/pull/31658
x_refsource_MISCThird Party Advisory
https://hackerone.com/reports/1153138
Vendor Advisoryx_refsource_GENTOOThird Party Advisory
https://security.gentoo.org/glsa/202208-17

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

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

CVSS

4.3MEDIUMGitHub_M
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
LOW
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-20CWE-400

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