CVE-2024-53441: 
JavaScript vulnerability analysis and mitigation

CVE-2024-53441 is a vulnerability discovered in cookie-encrypter v1.0.1 that affects the decryptCookie function in index.js. The vulnerability was disclosed on December 9, 2024, and allows remote attackers to execute a bit flipping attack to bypass authentication mechanisms. The vulnerability has been assigned a CVSS v3.1 base score of 9.1 (CRITICAL) (NVD).

The vulnerability exists in the decryptCookie function of cookie-encrypter v1.0.1 and involves a bit flipping attack against AES CBC encryption. The attack allows manipulation of encrypted cookies by XORing the Initialization Vector (IV) with specific values to modify the decrypted content. This vulnerability is classified under CWE-327 (Use of a Broken or Risky Cryptographic Algorithm) (NVD, Researcher Blog).

The successful exploitation of this vulnerability allows attackers to bypass authentication mechanisms and escalate privileges. In demonstrated proof-of-concept scenarios, attackers can modify encrypted cookies to change user roles from 'guest' to 'admin', effectively gaining unauthorized administrative access to protected resources (Researcher Blog).

No official patch or mitigation has been publicly announced for this vulnerability. Users of cookie-encrypter v1.0.1 should consider implementing additional authentication mechanisms or switching to alternative cookie encryption methods (NVD).