CVE-2021-32719 in VMware and Canonical Products
Published on June 28, 2021

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

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.

NVD

Vulnerability Analysis

CVE-2021-32719 can be exploited with network access, requires user interaction and user privileges. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to have a small impact on confidentiality and integrity, and no impact on availability.

Attack Vector:

NETWORK

Attack Complexity:

HIGH

Privileges Required:

HIGH

User Interaction:

REQUIRED

Scope:

UNCHANGED

Confidentiality Impact:

LOW

Integrity Impact:

LOW

Availability Impact:

NONE

Weakness Type

What is a Basic XSS Vulnerability?

The software receives input from an upstream component, but it does not neutralize or incorrectly neutralizes special characters such as "<", ">", and "&" that could be interpreted as web-scripting elements when they are sent to a downstream component that processes web pages. This may allow such characters to be treated as control characters, which are executed client-side in the context of the user's session. Although this can be classified as an injection problem, the more pertinent issue is the improper conversion of such special characters to respective context-appropriate entities before displaying them to the user.

CVE-2021-32719 has been classified to as a Basic XSS vulnerability or weakness.

Products Associated with CVE-2021-32719

You can be notified by email with stack.watch whenever vulnerabilities like CVE-2021-32719 are published in these products:

VMware Rabbitmq

Canonical Ubuntu Linux

Affected Versions

rabbitmq-server Version < 3.8.18 is affected by CVE-2021-32719

Exploit Probability

EPSS

0.12%

Percentile

31.08%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.