GHSA-cr56-66mx-293v Cross-Site Scripting in @toast-ui/editor
Attackers can execute arbitrary JavaScript in victims' browsers via XSS bypasses in the Toast UI Editor library.
- 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-cr56-66mx-293v?
GHSA-cr56-66mx-293v is a cross-site scripting vulnerability in @toast-ui/editor, 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 @toast-ui/editor prior to 2.2.0 are vulnerable to Cross-Site Scripting (XSS). There are multiple bypasses to the package's built-in XSS sanitization. This may allow attackers to execute arbitrary JavaScript on a victim's browser.
Recommendation
Upgrade to version 2.2.0 or later.
Which versions are affected by GHSA-cr56-66mx-293v?
2 open source packages ship an affected version, including @toast-ui/editor.
| Package | Affected | Fixed in |
|---|---|---|
@toast-ui/editor npm | All versions | 2.2.0 |
@toast-ui/editor npm | All versions | 2.2.0 |
How do I fix GHSA-cr56-66mx-293v?
Upgrade @toast-ui/editor to 2.2.0 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-cr56-66mx-293v being exploited?
There is no known exploitation of GHSA-cr56-66mx-293v in the wild and no public exploit code.