CVE-2021-21422

Public Exploit
XSS Vulnerability in mongo-express

Description

mongo-express is a web-based MongoDB admin interface, written with Node.js and express. 1: As mentioned in this issue: 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 a payload with embedded javascript. This could send an export of a collection to the attacker without even an admin knowing. Other types of attacks such as dropping a database\collection are possible.

Category

8.1
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 1.09% Top 25%
Third-Party Advisory github.com Third-Party Advisory github.com Third-Party Advisory github.com
Affected: mongo-express mongo-express
Published at:
Updated at:

References

Frequently Asked Questions

What is the severity of CVE-2021-21422?
CVE-2021-21422 has been scored as a high severity vulnerability.
How to fix CVE-2021-21422?
To fix CVE-2021-21422, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-21422 being actively exploited in the wild?
It is possible that CVE-2021-21422 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-21422?
CVE-2021-21422 affects mongo-express mongo-express.
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