GHSA-xr53-m937-jr9c Cross-Site Scripting in ngx-md
An attacker can inject malicious JavaScript via markdown links, leading to arbitrary code execution in the context of the user's browser.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is GHSA-xr53-m937-jr9c?
GHSA-xr53-m937-jr9c is a cross-site scripting vulnerability in ngx-md, published on 3 Sep 2020. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Versions of ngx-md prior to 6.0.3 are vulnerable to Cross-Site Scripting. Links are not properly restricted to http/https and can contain JavaScript which may lead to arbitrary code execution. Markdown input such as [Click Me](javascript:alert('Injected!'%29) is rendered as a Click Me link that executes JavaScript.
Recommendation
Upgrade to version 6.0.3 or later.
Which versions are affected by GHSA-xr53-m937-jr9c?
2 open source packages ship an affected version, including ngx-md.
| Package | Affected | Fixed in |
|---|---|---|
ngx-md npm | All versions | 6.0.3 |
ngx-md npm | All versions | 6.0.3 |
How do I fix GHSA-xr53-m937-jr9c?
Upgrade ngx-md to 6.0.3 or later.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is GHSA-xr53-m937-jr9c being exploited?
There is no known exploitation of GHSA-xr53-m937-jr9c in the wild and no public exploit code.