CVE-2021-22540

Published: Apr 22, 2021Modified: Jun 17, 2026

6.1

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Exploitability: 2.8 / Impact: 2.7

Source: NVD

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.

Affected (1)

Products: Dart: Dart Software Development Kit

Dart

1 product

Dart Software Development Kit

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Dart Dart Software Development Kit	Before 2.12.3

Related CWEs

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

References (4)

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

Source: cve-coordination@google.com

PatchThird Party Advisory

https://github.com/dart-lang/sdk/security/advisories/GHSA-3rfv-4jvg-9522

Source: cve-coordination@google.com

Broken Link

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

Source: af854a3a-2127-422b-91ae-364da2661108

PatchThird Party Advisory

https://github.com/dart-lang/sdk/security/advisories/GHSA-3rfv-4jvg-9522

Source: af854a3a-2127-422b-91ae-364da2661108

Broken Link

Timeline

No history available yet.