What’s Vulnerable › Vulnerabilities

CVE-2021-34364

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-06-09 · updated 2026-06-17
• Weakness: CWE-79

Description

The Refined GitHub browser extension before 21.6.8 might allow XSS via a link in a document. NOTE: github.com sends Content-Security-Policy headers to, in general, address XSS and other concerns.

Affected products

• Refined-Github Project Refined-Github: before 21.6.8 — fixed in 21.6.8

How to fix

Upgrade to a fixed version: Refined-Github Project Refined-Github 21.6.8. Check the vendor advisory for mitigations.

References

• https://github.com/sindresorhus/refined-github/releases/tag/21.6.8
• https://vuln.ryotak.me/advisories/47
• https://github.com/sindresorhus/refined-github/releases/tag/21.6.8
• https://vuln.ryotak.me/advisories/47

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