Upgrade to the latest version of BlogEngine.NET immediately.
In the fast-paced world of web development, software versions are often treated like milk cartons: once they pass their expiration date, they begin to spoil. For users of , that expiration date passed several years ago. However, due to the inertia of legacy systems, many blogs—both personal and corporate—still run this version. This article provides a deep technical dive into the most critical security vulnerability associated with this version: an unauthenticated deserialization flaw that leads to remote code execution (RCE). blogengine 3.3.6.0 exploit
The attacker sends a POST request to ~/post/ with the malicious .apost file. Because the SavePost method in version 3.3.6.0 does not verify the user's role for draft posts, the server accepts the file and writes it to the file system. Upgrade to the latest version of BlogEngine
: Ensure that directory listing is disabled in IIS to prevent attackers from easily mapping your file structure. Use a Web Application Firewall (WAF) However, due to the inertia of legacy systems,
The patch for BlogEngine 3.3.7.0 (released February 2019) introduced three critical fixes:
[malicious code]