![]() To exploit this vulnerability, an attacker needs to craft a malicious JWT token containing the HS256 algorithm, signed with the public RSA key of the victim application. ![]() On line 86 of the 'index.js' file, the algorithm to use for verifying the signature of the JWT token is taken from the JWT token, which at that point is still unverified and thus shouldn't be trusted. Affected versions of the json-web-token library are vulnerable to a JWT algorithm confusion attack. Joaquimserafim/json-web-token is a javascript library use to interact with JSON Web Tokens (JWT) which are a compact URL-safe means of representing claims to be transferred between two parties. This can allow authenticated attackers with contributor-level permissions or above to make web requests to arbitrary locations originating from the web application and can be used to query and modify information from internal services. The Crayon Syntax Highlighter plugin for WordPress is vulnerable to Server Side Request Forgery via the 'crayon' shortcode in versions up to, and including, 2.8.4. This information can be used to learn internal structure of the application and to further plot attacks against web servers and deployed web applications. ![]() The responses for web queries with certain parameters disclose internal path of resources. By providing a URL-encoded input attackers can cause the software’s web application to redirect to the chosen domain after a successful login is performed. A CWE-601 URL Redirection to Untrusted Site vulnerability exists that could cause an openredirect vulnerability leading to a cross site scripting attack. ![]()
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