CVE-2020-27359

Name: CVE-2020-27359
Creator: NVD / NIST
Published: 2020-11-02T21:15:28.71+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 0.80%

Last modified Jun 17, 2026

CVE-2020-27359 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. A cross-site scripting (XSS) issue in REDCap 8.11.6 through 9.x before 10 allows attackers to inject arbitrary JavaScript or HTML in the Messenger feature. It was found that the filename of the image or file attached in a message could be used to perform this XSS attack. EPSS estimates a 0.80% chance of exploitation in the next 30 days.

Description

A cross-site scripting (XSS) issue in REDCap 8.11.6 through 9.x before 10 allows attackers to inject arbitrary JavaScript or HTML in the Messenger feature. It was found that the filename of the image or file attached in a message could be used to perform this XSS attack. A user could craft a message and send it to anyone on the platform including admins. The XSS payload would execute on the other account without interaction from the user on several pages.

Metrics

CVSS 3.1

5.4/10

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

EPSS Probability

0.80%

51.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Evms	Redcap	>= 8.11.6, < 10.0.0

References

https://github.com/seb1055/cve-2020-27358-27359Third Party Advisory
https://www.evms.edu/research/resources_services/redcap/redcap_change_log/Release Notes, Vendor Advisory
https://www.ruse.tech/blog/38Third Party Advisory
https://github.com/seb1055/cve-2020-27358-27359Third Party Advisory
https://www.evms.edu/research/resources_services/redcap/redcap_change_log/Release Notes, Vendor Advisory
https://www.ruse.tech/blog/38Third Party Advisory

Timeline

Published: Nov 2, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-27359?

How severe is CVE-2020-27359?

CVE-2020-27359 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.80% probability of exploitation in the next 30 days.

How do I fix CVE-2020-27359?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-27359?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST