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6.1
MEDIUM CVSS 3.1
CVE-2025-56761
Memos Stored Cross Site Scripting (XSS) Vulnerability
Description

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.

INFO

Published Date :

Sept. 3, 2025, 5:15 p.m.

Last Modified :

Sept. 9, 2025, 6:27 p.m.

Remotely Exploit :

Yes !

Source :

[email protected]
Affected Products

The following products are affected by CVE-2025-56761 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Usememos memos
: Total Affected Vendor : 1 | Products : 1
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 MEDIUM 134c704f-9b21-4f2e-91b3-4a467353bcc0
CVSS 3.1 MEDIUM 134c704f-9b21-4f2e-91b3-4a467353bcc0
Solution
Address stored XSS in attachment and avatar uploads by validating content types.
  • Validate content types of uploaded attachments and avatars.
  • Sanitize all user-supplied input.
  • Update Memos to the latest secure version.
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2025-56761.

URL Resource
https://github.com/usememos/memos/blob/v0.24.0/server/router/api/v1/user_service.go#L147 Product
https://github.com/usememos/memos/blob/v0.24.4/server/router/api/v1/resource_service.go#L48 Product
https://www.sonarsource.com/blog/securing-go-applications-with-sonarqube-real-world-examples/ Exploit Patch Third Party Advisory
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2025-56761 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2025-56761 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2025-56761 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2025-56761 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • Initial Analysis by [email protected]

    Sep. 09, 2025

    Action Type Old Value New Value
    Added CPE Configuration OR *cpe:2.3:a:usememos:memos:0.22.0:*:*:*:*:*:*:*
    Added Reference Type MITRE: https://github.com/usememos/memos/blob/v0.24.0/server/router/api/v1/user_service.go#L147 Types: Product
    Added Reference Type MITRE: https://github.com/usememos/memos/blob/v0.24.4/server/router/api/v1/resource_service.go#L48 Types: Product
    Added Reference Type MITRE: https://www.sonarsource.com/blog/securing-go-applications-with-sonarqube-real-world-examples/ Types: Exploit, Patch, Third Party Advisory
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Sep. 04, 2025

    Action Type Old Value New Value
    Added CVSS V3.1 AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
    Removed CVSS V3.1 AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Sep. 03, 2025

    Action Type Old Value New Value
    Added CVSS V3.1 AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
    Added CWE CWE-79
  • New CVE Received by [email protected]

    Sep. 03, 2025

    Action Type Old Value New Value
    Added Description 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.
    Added Reference https://github.com/usememos/memos/blob/v0.24.0/server/router/api/v1/user_service.go#L147
    Added Reference https://github.com/usememos/memos/blob/v0.24.4/server/router/api/v1/resource_service.go#L48
    Added Reference https://www.sonarsource.com/blog/securing-go-applications-with-sonarqube-real-world-examples/
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 6.1
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact