Critical · published August 27, 2025
🚨 A sneaky server-side template injection lurks in CraftCMS's Freeform plugin, granting all form editors the keys to the kingdom! 🔥 Think of it like a restaurant where the chef takes orders but can also rewrite any recipe without oversight — suddenly, everyone's meals could be served with a secret ingredient you didn't ask for! This vulnerability allows an attacker with form editing access to inject and execute arbitrary code, leading to a complete compromise of the server. Picture this: an attacker could manipulate the server to unleash malware or exfiltrate sensitive data, turning your site into a hacker's playground. Absolutely devastating!
Think of it like a restaurant where the chef takes orders but can also rewrite any recipe without oversight — suddenly, everyone's meals could be served with a secret ingredient you didn't ask for! The Server-side template injection (SSTI) vulnerability in Freeform versions from 5.0.0 to just before 5.10.16 allows users with form editing permissions to execute arbitrary code on the server by manipulating template variables in the form submission title.
This vulnerability allows an attacker with form editing access to inject and execute arbitrary code, leading to a complete compromise of the server. Picture this: an attacker could manipulate the server to unleash malware or exfiltrate sensitive data, turning your site into a hacker's playground. Absolutely devastating! Immediately upgrade to Freeform version 5.10.16 or later to close this vulnerability. Review user permissions to ensure that only trusted users have form editing access, and consider conducting a security audit to check for other potential vulnerabilities. 🛡️ You've got this! Fixing this vulnerability is just a version upgrade away, and you can secure your CraftCMS site in no time! 🚀