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CVE-2025-56761

Good to know:

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Date: September 2, 2025

Memos 0.22 is vulnerable to Stored Cross site scripting (XSS) vulnerabilities by the upload attachment and user avatar features. Memos does not verify the content type of the uploaded data and serve it back as is. An authenticated attacker can use this to elevate their privileges when the stored XSS is viewed by an admin.

Severity Score

Related Resources (8)

https://www.sonarsource.com/blog/securing-go-applications-with-sonarqube-real-world-examples
https://github.com/usememos/memos/blob/v0.24.0/server/router/api/v1/user_service.go#L147
https://github.com/usememos/memos/blob/v0.24.4/server/router/api/v1/resource_service.go#L48
https://github.com/usememos/memos
https://github.com/advisories/GHSA-cgrg-86m5-xm4w
https://nvd.nist.gov/vuln/detail/CVE-2025-56761
https://www.sonarsource.com/blog/securing-go-applications-with-sonarqube-real-world-examples/
https://www.mend.io/vulnerability-database/CVE-2025-56761

Severity Score

Weakness Type (CWE)

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CWE-79

Top Fix

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Upgrade Version

Upgrade to version github.com/usememos/memos - no_fix

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): LOW
User Interaction (UI): REQUIRED
Scope (S): CHANGED
Confidentiality (C): LOW
Integrity (I): LOW
Availability (A): NONE

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