XSS in Usememos Memos
CVE-2025-56761
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.003 (15.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 16th percentile — 15.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000
Affected products
- Usememos Memos — versions 0.22.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/usememos/memos/blob/v0.24.4/server/router/api/v1/resource_service.go (Product)
- github.com/usememos/memos/blob/v0.24.0/server/router/api/v1/user_service.go (Product)
- www.sonarsource.com/blog/securing-go-applications-with-sonarqube-real-world-exa… (Exploit, Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2025-56761?
- CVE-2025-56761 is a medium-severity vulnerability in Usememos Memos, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2025-09-03.
- How severe is CVE-2025-56761?
- Medium severity. CVSS v3 base score is 5.4 out of 10.
- Is CVE-2025-56761 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.