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 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.

• CWE-79

• http://packetstormsecurity.com/files/166723/REDCap-Cross-Site-Scripting.htmlExploit, Third Party Advisory, VDB Entry
• https://redcap.med.usc.edu/_shib/assets/ChangeLog_Standard.pdfRelease Notes, Third Party Advisory
• https://www.project-redcap.org/Product
• http://packetstormsecurity.com/files/166723/REDCap-Cross-Site-Scripting.htmlExploit, Third Party Advisory, VDB Entry
• https://redcap.med.usc.edu/_shib/assets/ChangeLog_Standard.pdfRelease Notes, Third Party Advisory
• https://www.project-redcap.org/Product

Published

Apr 13, 2022

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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