CVE-2021-42136

Public Exploit

Description

A stored Cross-Site Scripting (XSS) vulnerability in the Missing Data Codes functionality of REDCap before 11.4.0 allows remote attackers to execute JavaScript code in the client's browser by storing said code as a Missing Data Code value. This can then be leveraged to execute a Cross-Site Request Forgery attack to escalate privileges to administrator.

Category

9.0
CVSS
Severity: Critical
CVSS 3.1 •
CVSS 2.0 •
EPSS 1.76% Top 20%
Third-Party Advisory packetstormsecurity.com Third-Party Advisory usc.edu
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://www.project-redcap.org/ product
https://redcap.med.usc.edu/_shib/assets/ChangeLog_Standard.pdf third party advisory release notes
http://packetstormsecurity.com/files/166723/REDCap-Cross-Site-Scripting.html third party advisory vdb entry exploit

Frequently Asked Questions

What is the severity of CVE-2021-42136?
CVE-2021-42136 has been scored as a critical severity vulnerability.
How to fix CVE-2021-42136?
To fix CVE-2021-42136, 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-2021-42136 being actively exploited in the wild?
It is possible that CVE-2021-42136 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~2% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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