XSS in Dart Software Development Kit
CVE-2021-22540
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.
Vulnerability class: XSS (Cross-Site Scripting)
EPSS: 0.007 (48.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
Affected products
- Dart Dart_software_development_kit
- Google Llc Dart Sdk — versions stable
Weakness classification (CWE)
References
- cve-coordination@google.com (x_refsource_CONFIRM, Broken Link)
- cve-coordination@google.com (x_refsource_CONFIRM, Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-22540?
- CVE-2021-22540 is a medium-severity vulnerability in Dart Software Development Kit, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-04-22.
- How severe is CVE-2021-22540?
- Medium severity. CVSS v3 base score is 6.1 out of 10.