Kestra Execution-File Preview Allows Malicious HTML Injection

Summary

Users of Kestra versions 1.1.10 and earlier may be at risk of having malicious HTML injected into the execution-file preview through user-supplied Markdown content. If exploited, this could potentially allow an attacker to execute arbitrary code or manipulate the user interface. Until a patch is released, we recommend that users avoid using the execution-file preview feature until a fix is available.

What to do

No fix is available yet. Check with your software vendor for updates.

Affected software

Vendor	Product	Affected versions	Fix available
kestra	kestra	<= 1.1.10	–

Original title

Kestra is an event-driven orchestration platform. In versions from 1.1.10 and prior, Kestra’s execution-file preview renders user-supplied Markdown (.md) with markdown-it instantiated as html:true ...

Original description

Kestra is an event-driven orchestration platform. In versions from 1.1.10 and prior, Kestra’s execution-file preview renders user-supplied Markdown (.md) with markdown-it instantiated as html:true and injects the resulting HTML with Vue’s v-html without sanitisation. At time of publication, there are no publicly available patches.

nvd CVSS3.1 7.3

Vulnerability type

CWE-79 Cross-site Scripting (XSS)