CVE-2021-42136

EPSS 4.7%

Vexday Risk Score

23Low

SSVC decision (CISA)

Attend

PoC available → attend closely

Exploit maturity

Proof of concept

Public proof of concept exists, but not yet automated.

CVSS —EPSS 4.7%KEV nãoPoC públicaNuclei —Metasploit —Patch —

Lifecycle

13 Apr 2022Published on NVD

19 Apr 2022Public PoC

Weaponization speed

5 daysto first PoC

Weaponized quickly — attackers prioritized this vulnerability. Patch urgently.

Recommendation: Plan a near-term fix — a public PoC already exists.

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.

Affected products

n/a · n/a

public PoCs found — 2

cve_referencepacketstormsecurity.com/files/166723/REDCap-Cross-Site-Scripting.htmlunverified exploitdbwww.exploit-db.com/exploits/50877unverified

⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.

References

http://packetstormsecurity.com/files/166723/REDCap-Cross-Site-Scripting.html https://redcap.med.usc.edu/_shib/assets/ChangeLog_Standard.pdf https://www.project-redcap.org/