CVE-2021-22540

XSS in Dart SDK

Description

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.

Category

6.1
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.36%
Third-Party Advisory github.com
Affected: Google LLC Dart SDK
Published at:
Updated at:

References

Link Tags
https://github.com/dart-lang/sdk/security/advisories/GHSA-3rfv-4jvg-9522 broken link
https://github.com/dart-lang/sdk/commit/ce5a1c2392debce967415d4c09359ff2555e3588 third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2021-22540?
CVE-2021-22540 has been scored as a medium severity vulnerability.
How to fix CVE-2021-22540?
To fix CVE-2021-22540, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-22540 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-22540 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-22540?
CVE-2021-22540 affects Google LLC Dart SDK.
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