CVE-2022-4686Public exploitNetwork attack vector

Authorization bypass via JSON-decoded patch IDs

Published Dec 23, 2022 · Updated Apr 9, 2025

Authorization bypass in Memos before 0.9.0 allows remote attackers to alter records through object IDs in patch request bodies. Patch model ID fields were JSON-decodable, so a body-supplied ID could replace the route-selected record identifier after authorization. No authentication or user interaction is required, and successful requests can expose or modify data and interrupt service.

CVSS severity8.6
High
EPSS probability0.73%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in Memos before 0.9.0 allows remote attackers to alter records through object IDs in patch request bodies. Patch model ID fields were JSON-decodable, so a body-supplied ID could replace the route-selected record identifier after authorization. No authentication or user interaction is required, and successful requests can expose or modify data and interrupt service.

The record

CVE
CVE-2022-4686
Published
Dec 23, 2022
Updated
Apr 9, 2025
Vendor
Memos
Product
Memos
Classifications
CWE-639, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 23, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 9, 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 <0.9.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Memos · Memosversion=unspecified <0.9.0

Published CVSS scores

9.8GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.6huntr.dev CNACVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-639Authorization Bypass Through User-Controlled Key
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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