What is the severity of CVE-2021-22540?

CVE-2021-22540 has a medium severity rating due to its potential for XSS attacks.

How do I fix CVE-2021-22540?

To fix CVE-2021-22540, upgrade the Dart SDK to version 2.12.3 or later.

What causes CVE-2021-22540?

CVE-2021-22540 is caused by bad validation logic in the Dart SDK that fails to properly sanitize DOM nodes from text.

Which versions of the Dart SDK are affected by CVE-2021-22540?

CVE-2021-22540 affects Dart SDK versions prior to 2.12.3.

Can CVE-2021-22540 lead to remote code execution?

CVE-2021-22540 can allow for XSS attacks, but it does not directly lead to remote code execution.

Vulnerability/
CVE-2021-22540

medium

6.1

CWE

22/4/2021

3/8/2024

CVE-2021-22540: XSS in Dart SDK

First published: Thu Apr 22 2021(Updated: )

Bad validation logic in the Dart SDK versions prior to 2.12.3 allow an attacker to use an XSS attack via DOM clobbering. The validation logic in dart:html for creating DOM nodes from text did not sanitize properly when it came across template tags.

Credit: cve-coordination@google.com

Affected Software	Affected Version	How to fix
Dart Dart Software Development Kit	<2.12.3

Remedy

https://github.com/dart-lang/sdk/commit/ce5a1c2392debce967415d4c09359ff2555e3588

Never miss a vulnerability like this again

Reference Links

Frequently Asked Questions

What is the severity of CVE-2021-22540?
CVE-2021-22540 has a medium severity rating due to its potential for XSS attacks.
How do I fix CVE-2021-22540?
To fix CVE-2021-22540, upgrade the Dart SDK to version 2.12.3 or later.
What causes CVE-2021-22540?
CVE-2021-22540 is caused by bad validation logic in the Dart SDK that fails to properly sanitize DOM nodes from text.
Which versions of the Dart SDK are affected by CVE-2021-22540?
CVE-2021-22540 affects Dart SDK versions prior to 2.12.3.
Can CVE-2021-22540 lead to remote code execution?
CVE-2021-22540 can allow for XSS attacks, but it does not directly lead to remote code execution.

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agent/title
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agent/severity
agent/weakness
agent/remedy
agent/description
agent/event
agent/first-publish-date
agent/tags
agent/source
vendor/dart
canonical/dart dart software development kit

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Frequently Asked Questions

What is the severity of CVE-2021-22540?
CVE-2021-22540 has a medium severity rating due to its potential for XSS attacks.
How do I fix CVE-2021-22540?
To fix CVE-2021-22540, upgrade the Dart SDK to version 2.12.3 or later.
What causes CVE-2021-22540?
CVE-2021-22540 is caused by bad validation logic in the Dart SDK that fails to properly sanitize DOM nodes from text.
Which versions of the Dart SDK are affected by CVE-2021-22540?
CVE-2021-22540 affects Dart SDK versions prior to 2.12.3.
Can CVE-2021-22540 lead to remote code execution?
CVE-2021-22540 can allow for XSS attacks, but it does not directly lead to remote code execution.