Is GitLab Markdown Viewer safe?

Medium risk

GitLab Markdown Viewer renders local Markdown files with raw HTML that can run unstripped event handlers.

When you open a local .md or .markdown file, the extension replaces the page with HTML rendered from that file. It allows raw HTML and removes only a short list of event-handler attributes, so crafted Markdown can still run page JavaScript through other event attributes.

Part of this rating comes from analysis signals we haven't published as detailed findings yet.

40Risk
Who publishes it

eph - no other listings under this identity, 2 shared hostnames

What this publisher told the store about itself, and the other listings that told it the same thing.

Shared hosts - 2 hostnames

Hostnames hardcoded in this extension that few other listings call. That can mean one operator behind both, and it can equally mean a small shared vendor, so it is context rather than a conclusion. Hosts that many listings call are left out: they are services, not connections.

code.kx.com
Also called by 4 other listings, including OpenAPI DevTools
scotthelme.co.uk
Also called by 4 other listings, including GuardExt

AI-generated. Findings may contain errors. Those marked Verified have been manually reviewed.

Publishers can request a review.

Updated 30 September 2026amo-940036