CVE-2025-56761: Github.com/usememos/memos Cross-Site Scripting Vulnerability

MODERATE
Advisory Identifier: GHSA-cgrg-86m5-xm4w
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CVSS 5.4
CWE-79
Published
Advisory Summary

CVE-2025-56761 is a MODERATE (CVSS 5.4) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Github.com/usememos/memos libraries in the Go ecosystem. The issue involves memos vulnerable to stored cross-site scripting. Remediation is available in the latest vendor maintenance releases.

CVE-2025-56761 at a Glance

CVE Identifier CVE-2025-56761
GHSA Identifier GHSA-cgrg-86m5-xm4w
Severity MODERATE
CVSS v3.1 Base Score 5.4
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product Github.com/usememos/memos
Package Ecosystem Go
Published Date
Last Updated

Security Impact

CVSS: 5.4

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction Required (UI:R)
Scope Changed (S:C)
Confidentiality Low (C:L)
Integrity Low (I:L)
Availability None (A:N)

How to Fix CVE-2025-56761

To remediate this vulnerability, upgrade all affected Github.com/usememos/memos dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

github.com/usememos/memos fixed: Latest secure release 
Upgrade github.com/usememos/memos to Latest secure release
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for github.com/usememos/memos

How to Check if You Are Affected

To determine whether your application is affected by CVE-2025-56761, inspect your project dependencies for Github.com/usememos/memos:

inspect dependencies for github.com/usememos/memos

Analyze the terminal output to locate any version of Github.com/usememos/memos in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'), where the product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. In Github.com/usememos/memos, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

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.

CVE-2025-56761 Affected Github.com/usememos/memos Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
github.com/usememos/memos
golang/github.com/usememos/memos
Go
≤ 0.22.0

References

Github.com/usememos/memos Source Repository REPOSITORY
https://github.com/usememos/memos
NVD — CVE-2025-56761 NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-56761
Github.com/usememos/memos Source Repository REPOSITORY
https://github.com/usememos/memos/blob/v0.24.0/server/router/api/v1/user_service.go#L147
Github.com/usememos/memos Source Repository REPOSITORY
https://github.com/usememos/memos/blob/v0.24.4/server/router/api/v1/resource_service.go#L48
www.sonarsource.com/blog/securing-go-ap... WEB
https://www.sonarsource.com/blog/securing-go-applications-with-sonarqube-real-world-examples

Frequently Asked Questions

What is CVE-2025-56761?
CVE-2025-56761 is a security vulnerability in Github.com/usememos/memos involving Memos Vulnerable to Stored Cross-Site Scripting under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Github.com/usememos/memos versions are affected?
Affected versions include releases prior to current release patches across affected packages: github.com/usememos/memos.
What version fixes CVE-2025-56761?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/usememos/memos affected?
Yes, github.com/usememos/memos is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of CVE-2025-56761?
CVE-2025-56761 has a CVSS v3.1 base score of 5.4 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.
What CWE is associated with CVE-2025-56761?
CVE-2025-56761 is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.).
How can I check Go dependencies for CVE-2025-56761?
Run the dependency tree command: 'inspect dependencies for github.com/usememos/memos'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-cgrg-86m5-xm4w",
  "modified" : "2025-09-05T15:33:48Z",
  "published" : "2025-09-04T15:30:28Z",
  "aliases" : [ "CVE-2025-56761" ],
  "summary" : "Memos Vulnerable to Stored Cross-Site Scripting",
  "details" : "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" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/usememos/memos"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "0.22.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-56761"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/usememos/memos"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/usememos/memos/blob/v0.24.0/server/router/api/v1/user_service.go#L147"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/usememos/memos/blob/v0.24.4/server/router/api/v1/resource_service.go#L48"
  }, {
    "type" : "WEB",
    "url" : "https://www.sonarsource.com/blog/securing-go-applications-with-sonarqube-real-world-examples"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-09-05T15:33:48Z",
    "nvd_published_at" : "2025-09-03T17:15:34Z"
  }
}