5.4

CVSS Score

3.1

-

CVSS Score

Basic Information

CVE ID

CVE-2022-4841

GHSA ID

GHSA-rmhx-9h5h-3xh3

EPSS Score

0.27547%

CWE

CWE-79

Published

12/29/2022

Updated

2/2/2023

KEV Status

Technology

Basic Information

CVE ID

GHSA ID

EPSS Score

CWE

Published

Updated

KEV Status

Technology

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CVE-2022-4841

CVE-2022-4841: usememos/memos vulnerable to stored Cross-site Scripting

Cross-site Scripting (XSS) - Stored in GitHub repository usememos/memos prior to 0.9.1.

(GitHub Advisory)

Miggo Vulnerability Database

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CVE-2022-4841

CVE-2022-4841:

5.4

CVSS Score

3.1

-

CVSS Score

Basic Information

CVE ID

CVE-2022-4841

GHSA ID

GHSA-rmhx-9h5h-3xh3

EPSS Score

0.27547%

CWE

CWE-79

Published

12/29/2022

Updated

2/2/2023

KEV Status

Technology

Basic Information

CVE ID

GHSA ID

EPSS Score

CWE

Published

Updated

KEV Status

Technology

Technical Details

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Package Name	Ecosystem	Vulnerable Versions	First Patched Version
github.com/usememos/memos	go	<= 0.9.0	0.9.1

Technical Details

Vulnerability Intelligence
Miggo AI

Root Cause Analysis

The vulnerability stemmed from how markdown parser components processed user input. Key observations:

The patch removed lodash's escape() from content before markdown parsing in Bold/BoldEmphasis/Emphasis/Link renderers, leaving raw user input exposed
Marked.js doesn't automatically escape HTML by default when generating output
The original code's escape() usage before markdown parsing was incorrect (escaped too early, breaking markdown syntax), but its removal without compensating output encoding created XSS vectors
The fix in Strikethrough.ts (adding escape()) demonstrates the pattern required for safety These renderers directly incorporated user-controlled content into HTML without proper contextual escaping, meeting CWE-79 criteria.

Vulnerable functions

Only Mi**o us*rs **n s** t*is s**tion

WAF Protection Rules

WAF Rule

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Reasoning

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5.4

-

Basic Information

Basic Information

Concerned about an active attack path?

CVE-2022-4841: usememos/memos vulnerable to stored Cross-site Scripting

CVE-2022-4841:

5.4

-

Basic Information

Basic Information

Technical Details

Technical Details

Vulnerability IntelligenceMiggo AI

Root Cause Analysis

Vulnerable functions

WAF Protection Rules

WAF Rule

Reasoning

Vulnerability IntelligenceMiggo AI

Vulnerability IntelligenceMiggo AI

Root Cause Analysis

Vulnerable functions

WAF Protection Rules

WAF Rule

Reasoning

CVE-2022-4841: usememos/memos vulnerable to stored Cross-site Scripting

5.4

5.4

Basic Information

Basic Information

Technical Details

Vulnerability Intelligence
Miggo AI

Vulnerability Intelligence
Miggo AI

Vulnerability Intelligence
Miggo AI