CVE-2021-32719 Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) in RabbitMQ federation management plugin
An attacker with elevated permissions can execute arbitrary JavaScript in the RabbitMQ management UI via unsanitized consumer tags in federation links.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2021-32719?
CVE-2021-32719 is a low-severity cross-site scripting vulnerability in rabbitmq-server, published on 28 Jun 2021. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official 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.
Which versions are affected by CVE-2021-32719?
1 open source package ship an affected version, including rabbitmq. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
rabbitmq Bitnami | All versions | 3.8.18 |
Products include Vmware Rabbitmq.
How do I fix CVE-2021-32719?
Upgrade rabbitmq to 3.8.18 or later.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2021-32719 being exploited?
There is no known exploitation of CVE-2021-32719 in the wild and no public exploit code.
Other vulnerabilities in rabbitmq-server
Sources
Also known as BIT-rabbitmq-2021-32719, CLEANSTART-2026-IO65038, DEBIAN-CVE-2021-32719, GHSA-5452-hxj4-773x, UBUNTU-CVE-2021-32719.