CVE-2025-50738

Description

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.

CVSS v3.1 Score

9.8

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-200 CWE-200

Affected Products

Vendor	Product	Versions
usememos	memos	< 0.24.3

References

Exploits

https://github.com/usememos/memos/issues/4707#issuecomment-2898504237

Other References

https://github.com/fai1424/Vulnerability-Research/tree/main/CVE-2025-50738 https://github.com/usememos/memos

Frequently Asked Questions

What is 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. It has a CVSS v3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2025-50738? +

CVE-2025-50738 has a CVSS v3.1 score of 9.8 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately.

What products are affected by CVE-2025-50738? +

CVE-2025-50738 affects products from usememos, specifically: memos. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-50738? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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