CVE-2022-4808Network attack vector

Host-account creation via client-controlled role

Published Dec 28, 2022 · Updated Apr 10, 2025

Improper privilege management in Memos before 0.9.1 allows remote authenticated users to create additional Host accounts. The POST /api/user handler decodes the requested role from JSON and, before the patch, does not reject Host as the new account's role. The route requires an existing Host session, and successful exploitation adds another account with full instance privileges.

CVSS severity4.2
Medium
EPSS probability0.42%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper privilege management in Memos before 0.9.1 allows remote authenticated users to create additional Host accounts. The POST /api/user handler decodes the requested role from JSON and, before the patch, does not reject Host as the new account's role. The route requires an existing Host session, and successful exploitation adds another account with full instance privileges.

The record

CVE
CVE-2022-4808
Published
Dec 28, 2022
Updated
Apr 10, 2025
Vendor
Memos
Product
Memos
Classifications
CWE-269, T1136.001
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Dec 28, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 10, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified <0.9.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Memos · Memosversion=unspecified <0.9.1

Published CVSS scores

4.2huntr.devCVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L
8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-269Improper Privilege Management
T1136.001Create Account: Local Account

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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