High · published December 12, 2025
⚡ An unfiltered ajax URL is your entry point! In Masa CMS versions 7.2.8 and below, and several others, this opens the door to sneaky XSS attacks! Think of it like a restaurant that skips checking the ingredients a customer orders — they could sneak in anything from spoiled food to a secret recipe for disaster. When an attacker injects scripts through this vulnerability, they can perform any action the user can, just like a chef cooking your meal without knowing what’s in it! An attacker could hijack user sessions, steal sensitive data, or even deface the website with malicious content. This could lead to absolutely devastating consequences for both the users and the organization, damaging trust and reputation.
Think of it like a restaurant that skips checking the ingredients a customer orders — they could sneak in anything from spoiled food to a secret recipe for disaster. When an attacker injects scripts through this vulnerability, they can perform any action the user can, just like a chef cooking your meal without knowing what’s in it! This XSS vulnerability occurs when an unsanitized ajax URL query parameter is directly included in the HTML <head> section. Attackers can execute arbitrary scripts in the context of a user's session, leading to a variety of attacks including session hijacking and data theft.
An attacker could hijack user sessions, steal sensitive data, or even deface the website with malicious content. This could lead to absolutely devastating consequences for both the users and the organization, damaging trust and reputation. Upgrade Masa CMS to version 7.5.2, 7.4.9, 7.3.14, or 7.2.9 to close this gap. Additionally, configure a Web Application Firewall (WAF) to block requests with common XSS payload characters, or implement server-side sanitization to strip or escape dangerous characters from ajax parameters. You've got this! With these steps, you'll be a security hero in no time! 🛡️
| Product | Versions | Fixed in |
|---|---|---|
| masacms/masacms | < 7.2.9 | 7.2.9 |
| masacms/masacms | ≥ 7.3.1, < 7.3.14 | 7.3.14 |
| masacms/masacms | ≥ 7.4.0, < 7.4.9 | 7.4.9 |
| masacms/masacms | ≥ 7.5.0, < 7.5.2 | 7.5.2 |