GHSA-r9q4-w3fm-wrm2 Cross-Site Scripting in google-closure-library
Attackers can execute arbitrary JavaScript via Mutation XSS in google-closure-library, requiring user interaction to trigger the vulnerability.
- 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-r9q4-w3fm-wrm2?
GHSA-r9q4-w3fm-wrm2 is a cross-site scripting vulnerability in google-closure-library, published on 2 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 google-closure-library prior to 20190301.0.0 are vulnerable to Cross-Site Scripting. The safedomtreeprocessor.processToString() function improperly processed empty elements, which could allow attackers to execute arbitrary JavaScript through Mutation Cross-Site Scripting.
Recommendation
Upgrade to version 20190301.0.0 or later.
Which versions are affected by GHSA-r9q4-w3fm-wrm2?
2 open source packages ship an affected version, including google-closure-library.
| Package | Affected | Fixed in |
|---|---|---|
google-closure-library npm | All versions | 20190301.0.0 |
google-closure-library npm | All versions | 20190301.0.0 |
How do I fix GHSA-r9q4-w3fm-wrm2?
Upgrade google-closure-library to 20190301.0.0 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-r9q4-w3fm-wrm2 being exploited?
There is no known exploitation of GHSA-r9q4-w3fm-wrm2 in the wild and no public exploit code.