Content >> Articles >> Saving the following Article text seems to cause problems: "..\..\..\.."

[CerberusMkII]

Steps to reproduce the issue

Go to:

• Content
• Articles
• New
• Populate Title field
• In Article Test field add the following text: ..\..\..\..
• Save

Expected result

Redirect back to "Article Saved." prompt

Actual result

From Vivaldi Web Browser: "This page isn’t working ERR_EMPTY_RESPONSE" (Article doesn't save)

Firefox (Internet Security software): "This page was blocked for your protection" (Article saves)

System information (as much as possible)

Vanilla Joomla 5.2.0 instance Tried on the following hosts:

• IONOS
• Basic Ubuntu Virtual Machine LAMP (Linux, Apache, MySQL, PHP) setup

Additional comments

On the Ubuntu Lamp instance it wouldn't save, but it does in IONOS but not before the internet security software blocks access right after.

[brianteeman]

This sounds like a mod_security rule on your server - nothing to do with joomla

[CerberusMkII]

It was a client side firewall. The enabled "network monitor" was throwing those errors on different browsers and hosting platforms. Apologies for posting this here, will try and be more thorough in the future.