Critical · published October 29, 2025
🚨 Unauthenticated file uploads? A website’s worst nightmare! Before version 10.1.1, DNN's HTML editor let malicious users waltz right in and replace existing files! 🔥 Think of it like an improperly monitored art gallery where anyone can swap out the paintings — a sneaky art thief could replace masterpieces with their own scribbles without a single guard in sight! If left unaddressed, a malicious actor could deface your website, replacing content with anything from a silly meme to harmful scripts, leading to loss of user trust or even data breaches. The consequences could be absolutely devastating if they pair this with XSS attacks, allowing for further exploitation and data theft!
Think of it like an improperly monitored art gallery where anyone can swap out the paintings — a sneaky art thief could replace masterpieces with their own scribbles without a single guard in sight! This vulnerability in DNN allows unauthenticated users to upload files and overwrite existing ones due to a misconfigured HTML editor. The absence of proper authentication checks means attackers can manipulate the server's file system unrestrictedly.
If left unaddressed, a malicious actor could deface your website, replacing content with anything from a silly meme to harmful scripts, leading to loss of user trust or even data breaches. The consequences could be absolutely devastating if they pair this with XSS attacks, allowing for further exploitation and data theft! Upgrade your DNN installation to version 10.1.1 immediately to resolve this critical vulnerability. Additionally, audit your file upload mechanisms to ensure they have proper authentication and validation in place. Regularly review permissions on your server to prevent unauthorized access. You’ve got this! Follow these steps, and you’ll have your website secured in no time! 🛡️
| Product | Versions | Fixed in |
|---|---|---|
| dnnsoftware/dotnetnuke | < 10.1.1 | 10.1.1 |