{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/22575?format=json","vulnerability_id":"VCID-amsh-qpt1-9qb7","summary":"Improper detection of disallowed URIs by Loofah `allowed_uri?`\n## Summary\n\n`Loofah::HTML5::Scrub.allowed_uri?` does not correctly reject `javascript:` URIs when the scheme is split by HTML entity-encoded control characters such as `
` (carriage return), `
` (line feed), or `	` (tab).\n\n## Details\n\nThe `allowed_uri?` method strips literal control characters before decoding HTML entities. Payloads like `java
script:alert(1)` survive the control character strip, then `
` is decoded to a carriage return, producing `java\\rscript:alert(1)`.\n\nNote that the Loofah sanitizer's default `sanitize()` path is **not affected** because Nokogiri decodes HTML entities during parsing before Loofah evaluates the URI protocol. This issue only affects direct callers of the `allowed_uri?` string-level helper when passing HTML-encoded strings.\n\n## Impact\n\nApplications that call `Loofah::HTML5::Scrub.allowed_uri?` to validate user-controlled URLs and then render approved URLs into `href` or other browser-interpreted URI attributes may be vulnerable to cross-site scripting (XSS).\n\nThis only affects Loofah `2.25.0`.\n\n## Mitigation\n\nUpgrade to Loofah >= `2.25.1`.\n\n## Credit\n\nResponsibly reported by HackOne user `@smlee`.","aliases":[{"alias":"GHSA-46fp-8f5p-pf2m"}],"fixed_packages":[{"url":"http://public2.vulnerablecode.io/api/packages/65210?format=json","purl":"pkg:gem/loofah@2.25.1","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-amsh-qpt1-9qb7"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:gem/loofah@2.25.1"}],"affected_packages":[{"url":"http://public2.vulnerablecode.io/api/packages/141745?format=json","purl":"pkg:gem/loofah@0.2.0","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-ab24-w4sg-bbax"},{"vulnerability":"VCID-amsh-qpt1-9qb7"},{"vulnerability":"VCID-paw4-xkmu-w7eb"},{"vulnerability":"VCID-q52h-9tcw-zfab"},{"vulnerability":"VCID-sqa5-8yrd-qyfz"},{"vulnerability":"VCID-wxfr-bs81-augc"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:gem/loofah@0.2.0"},{"url":"http://public2.vulnerablecode.io/api/packages/141746?format=json","purl":"pkg:gem/loofah@0.2.1","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-ab24-w4sg-bbax"},{"vulnerability":"VCID-amsh-qpt1-9qb7"},{"vulnerability":"VCID-paw4-xkmu-w7eb"},{"vulnerability":"VCID-q52h-9tcw-zfab"},{"vulnerability":"VCID-sqa5-8yrd-qyfz"},{"vulnerability":"VCID-wxfr-bs81-augc"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:gem/loofah@0.2.1"},{"url":"http://public2.vulnerablecode.io/api/packages/141747?format=json","purl":"pkg:gem/loofah@0.2.2","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-ab24-w4sg-bbax"},{"vulnerability":"VCID-amsh-qpt1-9qb7"},{"vulnerability":"VCID-paw4-xkmu-w7eb"},{"vulnerability":"VCID-q52h-9tcw-zfab"},{"vulnerability":"VCID-sqa5-8yrd-qyfz"},{"vulnerability":"VCID-wxfr-bs81-augc"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:gem/loofah@0.2.2"},{"url":"http://public2.vulnerablecode.io/api/packages/141748?format=json","purl":"pkg:gem/loofah@0.3.0","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-ab24-w4sg-bbax"},{"vulnerability":"VCID-amsh-qpt1-9qb7"},{"vulnerability":"VCID-paw4-xkmu-w7eb"},{"vulnerability":"VCID-q52h-9tcw-zfab"},{"vulnerability":"VCID-sqa5-8yrd-qyfz"},{"vulnerability":"VCID-wxfr-bs81-augc"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:gem/loofah@0.3.0"},{"url":"http://public2.vulnerablecode.io/api/packages/141749?format=json","purl":"pkg:gem/loofah@0.3.1","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-ab24-w4sg-bbax"},{"vulnerability":"VCID-amsh-qpt1-9qb7"},{"vulnerability":"VCID-paw4-xkmu-w7eb"},{"vulnerability":"VCID-q52h-9tcw-zfab"},{"vulnerability":"VCID-sqa5-8yrd-qyfz"},{"vulnerability":"VCID-wxfr-bs81-augc"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:gem/loofah@0.3.1"},{"url":"http://public2.vulnerablecode.io/api/packages/141750?format=json","purl":"pkg:gem/loofah@0.4.0","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-ab24-w4sg-bbax"},{"vulnerability":"VCID-amsh-qpt1-9qb7"},{"vulnerability":"VCID-paw4-xkmu-w7eb"},{"vulnerability":"VCID-q52h-9tcw-zfab"},{"vulnerability":"VCID-sqa5-8yrd-qyfz"},{"vulnerability":"VCID-wxfr-bs81-augc"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:gem/loofah@0.4.0"},{"url":"http://public2.vulnerablecode.io/api/packages/141751?format=json","purl":"pkg:gem/loofah@0.4.1","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-ab24-w4sg-bbax"},{"vulnerability":"VCID-amsh-qpt1-9qb7"},{"vulnerability":"VCID-paw4-xkmu-w7eb"},{"vulnerability":"VCID-q52h-9tcw-zfab"},{"vulnerability":"VCID-sqa5-8yrd-qyfz"},{"vulnerability":"VCID-wxfr-bs81-augc"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:gem/loofah@0.4.1"},{"url":"http://public2.vulnerablecode.io/api/packages/141752?format=json","purl":"pkg:gem/loofah@0.4.2","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-ab24-w4sg-bbax"},{"vulnerability":"VCID-amsh-qpt1-9qb7"},{"vulnerability":"VCID-paw4-xkmu-w7eb"},{"vulnerability":"VCID-q52h-9tcw-zfab"},{"vulnerability":"VCID-sqa5-8yrd-qyfz"},{"vulnerability":"VCID-wxfr-bs81-augc"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:gem/loofah@0.4.2"},{"url":"http://public2.vulnerablecode.io/api/packages/141753?format=json","purl":"pkg:gem/loofah@0.4.3","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-ab24-w4sg-bbax"},{"vulnerability":"VCID-amsh-qpt1-9qb7"},{"vulnerability":"VCID-paw4-xkmu-w7eb"},{"vulnerability":"VCID-q52h-9tcw-zfab"},{"vulnerability":"VCID-sqa5-8yrd-qyfz"},{"vulnerability":"VCID-wxfr-bs81-augc"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:gem/loofah@0.4.3"},{"url":"http://public2.vulnerablecode.io/api/packages/141754?format=json","purl":"pkg:gem/loofah@0.4.4","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-ab24-w4sg-bbax"},{"vulnerability":"VCID-amsh-qpt1-9qb7"},{"vulnerability":"VCID-paw4-xkmu-w7eb"},{"vulnerability":"VCID-q52h-9tcw-zfab"},{"vulner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