What’s Vulnerable › Vulnerabilities

CVE-2021-29489: Options structure open to XSS if passed unfiltered

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-05-05 · updated 2026-06-17
• Weakness: CWE-79

Description

Highcharts JS is a JavaScript charting library based on SVG. In Highcharts versions 8 and earlier, the chart options structure was not systematically filtered for XSS vectors. The potential impact was that content from untrusted sources could execute code in the end user's browser. The vulnerability is patched in version 9. As a workaround, implementers who are not able to upgrade may apply DOMPurify recursively to the options structure to filter out malicious markup.

Affected products

• highcharts: before 9.0.0 — fixed in 9.0.0
• NetApp Cloud Backup: all versions
• OnCommand Insight: all versions
• NetApp OnCommand Workflow Automation: all versions
• NetApp SnapCenter: all versions

How to fix

Upgrade to a fixed version: highcharts 9.0.0. Check the vendor advisory for mitigations.

References

• https://github.com/highcharts/highcharts/security/advisories/GHSA-8j65-4pcq-xq95
• https://security.netapp.com/advisory/ntap-20210622-0005/
• https://github.com/highcharts/highcharts/security/advisories/GHSA-8j65-4pcq-xq95
• https://security.netapp.com/advisory/ntap-20210622-0005/

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