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.

CVSS v3.1

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

CVSS v2.0

3.5 LOWAV:N/AC:M/Au:S/C:N/I:P/A:N

EPSS

4.66% chance of exploitation in the next 30 days, 91th percentile

Published

2022-04-13

Updated

2024-08-04

Proof-of-concept exploits (1)

• http://packetstormsecurity.com/files/166723/REDCap-Cross-Site-Scripting.html

ExploitDB entries (1)

• https://www.exploit-db.com/exploits/50877

References

• CVE Record
• NVD entry

Related

• CVE-2021-42112
• CVE-2021-42165
• CVE-2021-42083
• CVE-2021-42168
• CVE-2021-42082
• CVE-2021-42169