The ACME-challenge endpoint in Appwrite 0.5.0 through 0.12.x before 0.12.2 allows remote attackers to read arbitrary local files via ../ directory traversal. In order to be vulnerable, APP_STORAGE_CERTIFICATES/.well-known/acme-challenge must exist on disk. (This pathname is automatically created if the user chooses to install Let's Encrypt certificates via Appwrite.)
Appwrite <= v1.4.13 is affected by a Server-Side Request Forgery (SSRF) via the '/v1/avatars/favicon' endpoint due to an incomplete fix of CVE-2023-27159.
Appwrite up to v1.2.1 was discovered to contain a Server-Side Request Forgery (SSRF) via the component /v1/avatars/favicon. This vulnerability allows attackers to access network resources and sensitive information via a crafted GET request.