CVE-2023-4697Public exploitNetwork attack vector

Authenticated privilege escalation via invalid JWT acceptance

Published Sep 1, 2023 · Updated Oct 1, 2024

Privilege escalation in Memos before 0.13.2 allows remote authenticated users to impersonate another user via a malformed access token. JWTMiddleware consumes parsed JWT claims without checking accessToken.Valid, so an invalidly signed token still supplies the request's user ID. A low-privileged account and an existing higher-privileged user ID are sufficient to obtain that user's access to notes and administrative functions.

CVSS severity8.8
High
EPSS probability0.85%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Privilege escalation in Memos before 0.13.2 allows remote authenticated users to impersonate another user via a malformed access token. JWTMiddleware consumes parsed JWT claims without checking accessToken.Valid, so an invalidly signed token still supplies the request's user ID. A low-privileged account and an existing higher-privileged user ID are sufficient to obtain that user's access to notes and administrative functions.

The record

CVE
CVE-2023-4697
Published
Sep 1, 2023
Updated
Oct 1, 2024
Vendor
Memos
Product
Memos
Classifications
CWE-269, CAPEC-58, CAPEC-233, CAPEC-122, T1068
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 1, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 1, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=unspecified <0.13.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Memos · Memosversion=unspecified <0.13.2

Published CVSS scores

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

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-269Improper Privilege Management
CAPEC-58Restful Privilege Elevation
CAPEC-233Privilege Escalation
CAPEC-122Privilege Abuse
T1068Exploitation for Privilege Escalation

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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