Critical severity9.0NVD Advisory· Published Apr 13, 2022· Updated Jun 17, 2026
CVE-2021-42136
CVE-2021-42136
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.
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Affected products
2Patches
Vulnerability mechanics
References
3- packetstormsecurity.com/files/166723/REDCap-Cross-Site-Scripting.htmlnvdExploitThird Party AdvisoryVDB Entry
- redcap.med.usc.edu/_shib/assets/ChangeLog_Standard.pdfnvdRelease NotesThird Party Advisory
- www.project-redcap.orgnvdProduct
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