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Critical severity · published Apr 13, 2022
CVE-2021-42136
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…
9.0
CVSS
4.7%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)4.7% · higher than 92% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RE
Redcap · Vanderbilt
before 11.4.0 · source: NVD
Affected product
RE
Redcap
Vanderbilt
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-42136
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-42136
Exploit
http://packetstormsecurity.com/files/166723/REDCap-Cross-Site-Scripting.html
Release Notes
https://redcap.med.usc.edu/_shib/assets/ChangeLog_Standard.pdf
Product
https://www.project-redcap.org/
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