# CVE-2025-56761: CVE-2025-56761

Status: published. Published: 2025-09-03. Updated: 2026-11-07.

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.

## Remediation

- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: cve@mitre.org) — https://www.sonarsource.com/blog/securing-go-applications-with-sonarqube-real-world-examples/

## Affected products and versions

- usememos / memos: 0.22.0 (affected, custom). Source: NVD

## NVD configuration conditions

Affected CPE matches depend on the following AND/OR and negation conditions:

```json
[
  {
    "negate": false,
    "nodes": [
      {
        "cpeMatch": [
          {
            "criteria": "cpe:2.3:a:usememos:memos:0.22.0:*:*:*:*:*:*:*",
            "vulnerable": true
          }
        ],
        "negate": false,
        "operator": "OR"
      }
    ],
    "operator": "OR"
  }
]
```

## Severity and prioritization

- CVSS 3.1: 5.4 (medium); CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N; source: NVD: 134c704f-9b21-4f2e-91b3-4a467353bcc0

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: exploitation poc; automatable no; technical impact partial; source NVD SSVC: 134c704f-9b21-4f2e-91b3-4a467353bcc0

- Weaknesses: CWE-79

## Exploit evidence

- exploit: https://www.sonarsource.com/blog/securing-go-applications-with-sonarqube-real-world-examples/ (cve@mitre.org)

## References

- https://github.com/usememos/memos/blob/v0.24.0/server/router/api/v1/user_service.go#L147 (cve@mitre.org; Product)

- https://github.com/usememos/memos/blob/v0.24.4/server/router/api/v1/resource_service.go#L48 (cve@mitre.org; Product)

- https://www.sonarsource.com/blog/securing-go-applications-with-sonarqube-real-world-examples/ (cve@mitre.org; Exploit, Patch, Third Party Advisory)

## Provenance

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-56761; retrieved 2026-11-07; source updated 2026-11-07

Revision: 579f00d9d1297cc4ac3d639a15cae929c5a2f8a5a37e29251d992088eadbf27e

Canonical: https://y2.dev/cve/CVE-2025-56761

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