It’s possible to copy-paste text into a Kerika Chat message, and there are legitimate use-cases for this: for example, a developer may ask a question to a coworker who replies with a code snippet.

Kerika handles code in chat messages by storing two versions of the message: as plain-text, and as the original format. When a chat message is displayed, the original format is used but not executed, which means the embedded code is visible, but doesn’t run in the browser. This makes it easy and safe to share code snippets through chat messages.

While making this improvement, we went through all the places where a user can type in text, Card Title and Description, Board Name and Description, Tag, Attachment Name, etc. to make sure we are guarding against malicious code injection.