CVE-2020-27358

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.0% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2020-11-02 · updated 2026-06-17
Weakness: CWE-276

Description

An issue was discovered in REDCap 8.11.6 through 9.x before 10. The messenger's CSV feature (that allows users to export their conversation threads as CSV) allows non-privileged users to export one another's conversation threads by changing the thread_id parameter in the request to the endpoint Messenger/messenger_download_csv.php?title=Hey&thread_id={THREAD_ID}.

Affected products

Vanderbilt REDCap: from 8.11.6 before 10.0 — fixed in 10.0

How to fix

Upgrade to a fixed version: Vanderbilt REDCap 10.0. Check the vendor advisory for mitigations.

References

https://github.com/seb1055/cve-2020-27358-27359
https://www.evms.edu/research/resources_services/redcap/redcap_change_log/
https://www.ruse.tech/blog/38
https://github.com/seb1055/cve-2020-27358-27359
https://www.evms.edu/research/resources_services/redcap/redcap_change_log/
https://www.ruse.tech/blog/38

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