Information disclosure in Usememos Memos
CVE-2025-50738
The Memos application, up to version v0.24.3, allows for the embedding of markdown images with arbitrary URLs. When a user views a memo containing such an image, their browser automatically fetches the image URL without explicit user consent or interaction beyond viewing the memo. This can be exploited by an attacker to disclose the viewing user's IP address, browser User-Agent string, and potentially other request-specific information to the attacker-controlled server, leading to information disclosure and user tracking.
Vulnerability class: Information Disclosure
EPSS: 0.021 (80.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Usememos Memos
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org (Product)
- cve@mitre.org (Exploit, Issue Tracking)
- cve@mitre.org
Frequently asked questions
- What is CVE-2025-50738?
- CVE-2025-50738 is a critical-severity vulnerability in Usememos Memos, classified under Information Disclosure. CVSS score: 9.8/10. Published 2025-07-29.
- How severe is CVE-2025-50738?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2025-50738 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.