Cloud Session Hijacking: A Silent Threat to SaaS Security

Cloud session hijacking is a cyberattack where threat actors gain unauthorized access to a user’s active cloud session—often without needing login credentials. By intercepting session tokens or cookies via phishing, XSS, or insecure APIs, attackers can impersonate users and access sensitive data within SaaS platforms. This technique bypasses traditional login and MFA protections, making it a serious threat to cloud environments. Organizations must secure cloud sessions with token encryption, short session lifespans, real-time monitoring, and anomaly detection. Enforcing zero trust policies and educating users about phishing threats further helps mitigate session hijacking risks in cloud-based systems.

“Cookie Bite” Entra ID Attack Exposes Microsoft 365

“Cookie Bite” Entra ID Attack Exposes Microsoft 365: A Critical Cloud Security Wake-Up Call

Ravi Jain
“Cookie Bite” attack, a novel method where malicious browser extensions steal authentication cookies like ESTSAUTH and ESTSAUTHPERSISTENT from users of Microsoft 365 and Azure Entra ID. By leveraging these cookies, attackers can bypass Multi-Factor Authentication (MFA) and hijack legitimate sessions, gaining unauthorized access to services like Outlook, Teams, and SharePoint. This attack is particularly dangerous because it operates within the browser and does not require system-level compromise, making it difficult to detect through traditional security measures. The article highlights the risks of this attack, including data exfiltration and internal impersonation, and outlines mitigation strategies such as monitoring risk-based sign-ins, implementing browser-level protections, and limiting session persistence. It also introduces Technijian's security services as a solution to protect against this and similar threats. ... Read More