8.8

CVSS Score

3.1

-

CVSS Score

Basic Information

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CVE-2022-4688

CVE-2022-4688: usememos/memos vulnerable to improper authorization

usememos/memos is an open-source, self-hosted memo hub with knowledge management and socialization. Memos versions prior to 0.9.0 are vulnerable to improper authorization, which can allow a user to modify the nickname, username and email of other users without permission.

(GitHub Advisory)

Miggo Vulnerability Database

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CVE-2022-4688

CVE-2022-4688:

8.8

CVSS Score

3.1

-

CVSS Score

Basic Information

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Technical Details

Package Name	Ecosystem	Vulnerable Versions	First Patched Version
github.com/usememos/memos	go	< 0.9.0	0.9.0

Technical Details

Vulnerability Intelligence
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Root Cause Analysis

The root cause was improper deserialization control of the 'ID' field in PATCH request handlers. The pre-patch struct definitions (UserPatch/MemoPatch/etc.) allowed clients to submit arbitrary IDs via JSON payloads. By adding json:"-" to the ID fields in the commit dca35bd, the server stopped accepting client-provided IDs, forcing the use of authenticated context for authorization. While the primary exploit targeted user data (UserPatch), the same pattern existed in other PATCH handlers (Memo/Resource/Shortcut), making them potentially vulnerable too. The 'high' confidence for UserPatch stems from the CVE's explicit description of user data modification, while others are marked 'medium' due to structural similarity but less explicit evidence of exploitation.

Vulnerable functions

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WAF Protection Rules

WAF Rule

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Reasoning

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