VULNERABILITY INTELLIGENCE

CVE-2021-42136

CVSS score9 CRITICAL

EPSS probability4.66%

CISA KEVNot currently listed

Published2022-04-13

Last modified2026-06-17

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

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.

Weakness classification

nvd@nist.gov: CWE-79

Primary references

cve@mitre.org — Exploit, Third Party Advisory, VDB Entry
cve@mitre.org — Release Notes, Third Party Advisory
cve@mitre.org — Product
af854a3a-2127-422b-91ae-364da2661108 — Exploit, Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108 — Release Notes, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Product