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)
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.007 (50.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 50.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000
Affected products
- Dart Software Development Kit
- Google Llc Dart Sdk — versions stable
Weakness classification (CWE)
References
- github.com/dart-lang/sdk/security/advisories/GHSA-3rfv-4jvg-9522 (Broken Link)
- github.com/dart-lang/sdk/commit/ce5a1c2392debce967415d4c09359ff2555e3588 (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.