CVE-2020-8264: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

January 6, 2021 (updated January 12, 2021)

In actionpack gem, a possible XSS vulnerability exists when an application is running in development mode allowing an attacker to send or embed (in another page) a specially crafted URL which can allow the attacker to execute JavaScript in the context of the local application. This vulnerability is in the Actionable Exceptions middleware.

References

groups.google.com/g/rubyonrails-security/c/yQzUVfv42jk/m/oJWw-xhNAQAJ
hackerone.com/reports/904059
nvd.nist.gov/vuln/detail/CVE-2020-8264

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