CVE-2021-42136

CriticalCVSS 9.0/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 9.0/10CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

Weakness enumeration

CWE-79

Affected software

No affected versions have been published.

Timeline

Published: Apr 13, 2022
Last modified: Jun 17, 2026
NVD status: Modified

Related CVEs from 2021

CVE-2021-421375.3An issue was discovered in Zammad before 5.0.1. In some cases, there is improper enforcement of the privilege requirement for viewing a list CVE-2021-421386.5A user of a machine protected by SafeNet Agent for Windows Logon may leverage weak entropy to access the encrypted credentials of any or all CVE-2021-421399.8Deno Standard Modules before 0.107.0 allows Code Injection via an untrusted YAML file in certain configurations.CVE-2021-42145.5A heap overflow flaw was found in libpngs' pngimage.c program. This flaw allows an attacker with local network access to pass a specially cr CVE-2021-421419.8An issue was discovered in Contiki-NG tinyDTLS through 2018-08-30. One incorrect handshake could complete with different epoch numbers in th CVE-2021-421429.8An issue was discovered in Contiki-NG tinyDTLS through master branch 53a0d97. DTLS servers mishandle the early use of a large epoch number. CVE-2021-421439.1An issue was discovered in Contiki-NG tinyDTLS through master branch 53a0d97. An infinite loop bug exists during the handling of a ClientHel CVE-2021-421449.8Buffer over-read vulnerability in Contiki-NG tinyDTLS through master branch 53a0d97 allows attackers obtain sensitive information via crafte CVE-2021-421457.5An assertion failure discovered in in check_certificate_request() in Contiki-NG tinyDTLS through master branch 53a0d97 allows attackers to c CVE-2021-421467.5An issue was discovered in Contiki-NG tinyDTLS through master branch 53a0d97. DTLS servers allow remote attackers to reuse the same epoch nu CVE-2021-421479.1Buffer over-read vulnerability in the dtls_sha256_update function in Contiki-NG tinyDTLS through master branch 53a0d97 allows remote attacke CVE-2021-42165.5A Floating point exception (division-by-zero) flaw was found in Mupdf for zero width pages in muraster.c. It is fixed in Mupdf-1.20.0-rc1 up