High · published January 10, 2026
⚡ Just a misconfigured sendmail path can turn any registered OpenProject admin into a command-executing ninja! 🥷 Think of it like a restaurant where the chef can substitute ingredients without anyone checking the recipe — only here, it allows for any dish to be cooked, including some that might not be safe! An attacker with administrative access could execute arbitrary commands on the server, leading to potentially devastating consequences like data theft or an entire server takeover. It’s like giving a chef the keys to the pantry and the cash register — they can cook whatever they want and take the profits!
Think of it like a restaurant where the chef can substitute ingredients without anyone checking the recipe — only here, it allows for any dish to be cooked, including some that might not be safe! In OpenProject versions 16.6.1 and below, a registered administrator can manipulate the sendmail binary path in a test email, allowing them to run any command they desire, effectively bypassing security measures.
An attacker with administrative access could execute arbitrary commands on the server, leading to potentially devastating consequences like data theft or an entire server takeover. It’s like giving a chef the keys to the pantry and the cash register — they can cook whatever they want and take the profits! Immediately upgrade to OpenProject version 16.6.2 to close this exploit. Review your admin configurations to ensure no unauthorized changes can be made in the future. Regularly audit permissions and user roles to keep access in check. You've got this! With these updates, you’ll be tightening security and keeping your project management safe! 🛡️