CVE-2018-14731 Missing Origin Validation in parcel-bundler
Attackers can steal developer code by connecting to the Parcel HMR WebSocket server from any origin due to missing origin checks.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2018-14731?
CVE-2018-14731 is a high-severity vulnerability in n/a, published on 21 Sep 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An issue was discovered in HMRServer.js in Parcel parcel-bundler. Attackers are able to steal developer's code because the origin of requests is not checked by the WebSocket server, which is used for HMR (Hot Module Replacement). Anyone can receive the HMR message sent by the WebSocket server via a ws://127.0.0.1 connection (with a random TCP port number) from any origin. The random port number can be found by connecting to http://127.0.0.1 and reading the "new WebSocket" line in the source code.
Weakness: CWE-200
Which versions are affected by CVE-2018-14731?
2 open source packages ship an affected version, including parcel-bundler. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
parcel-bundler npm | All versions | 1.10.0 |
parcel-bundler npm | All versions | 1.10.0 |
Products include Parceljs Parcel.
How do I fix CVE-2018-14731?
Upgrade parcel-bundler to 1.10.0 or later.
Is CVE-2018-14731 being exploited?
There is no known exploitation of CVE-2018-14731 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-37q6-576q-vgr7.