What’s Vulnerable › Vulnerabilities

CVE-2024-53986: Possible XSS vulnerability with certain configurations of rails-html-sanitizer 1.6.0

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-12-02 · updated 2026-06-17
• Weakness: CWE-79

Description

rails-html-sanitizer is responsible for sanitizing HTML fragments in Rails applications. There is a possible XSS vulnerability with certain configurations of Rails::HTML::Sanitizer 1.6.0 when used with Rails >= 7.1.0. A possible XSS vulnerability with certain configurations of Rails::HTML::Sanitizer may allow an attacker to inject content if HTML5 sanitization is enabled and the application developer has overridden the sanitizer's allowed tags where the "math" and "style" elements are both explicitly allowed. This vulnerability is fixed in 1.6.1.

Affected products

• rails-html-sanitizer: 1.6.0

References

• https://github.com/rails/rails-html-sanitizer/commit/f02ffbb8465e73920b6de0da940f5530f855965e
• https://github.com/rails/rails-html-sanitizer/security/advisories/GHSA-638j-pmjw-jq48

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