Package Instance

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{
    "url": "http://public2.vulnerablecode.io/api/packages/141789?format=api",
    "purl": "pkg:gem/loofah@2.21.0.rc1",
    "type": "gem",
    "namespace": "",
    "name": "loofah",
    "version": "2.21.0.rc1",
    "qualifiers": {},
    "subpath": "",
    "is_vulnerable": true,
    "next_non_vulnerable_version": null,
    "latest_non_vulnerable_version": null,
    "affected_by_vulnerabilities": [
        {
            "url": "http://public2.vulnerablecode.io/api/vulnerabilities/22575?format=api",
            "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`.",
            "references": [
                {
                    "reference_url": "https://github.com/flavorjones/loofah",
                    "reference_id": "",
                    "reference_type": "",
                    "scores": [
                        {
                            "value": "2.7",
                            "scoring_system": "cvssv4",
                            "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U"
                        },
                        {
                            "value": "LOW",
                            "scoring_system": "generic_textual",
                            "scoring_elements": ""
                        }
                    ],
                    "url": "https://github.com/flavorjones/loofah"
                },
                {
                    "reference_url": "https://github.com/flavorjones/loofah/security/advisories/GHSA-46fp-8f5p-pf2m",
                    "reference_id": "",
                    "reference_type": "",
                    "scores": [
                        {
                            "value": "LOW",
                            "scoring_system": "cvssv3.1_qr",
                            "scoring_elements": ""
                        },
                        {
                            "value": "2.7",
                            "scoring_system": "cvssv4",
                            "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U"
                        },
                        {
                            "value": "LOW",
                            "scoring_system": "generic_textual",
                            "scoring_elements": ""
                        }
                    ],
                    "url": "https://github.com/flavorjones/loofah/security/advisories/GHSA-46fp-8f5p-pf2m"
                },
                {
                    "reference_url": "https://github.com/advisories/GHSA-46fp-8f5p-pf2m",
                    "reference_id": "GHSA-46fp-8f5p-pf2m",
                    "reference_type": "",
                    "scores": [
                        {
                            "value": "LOW",
                            "scoring_system": "cvssv3.1_qr",
                            "scoring_elements": ""
                        }
                    ],
                    "url": "https://github.com/advisories/GHSA-46fp-8f5p-pf2m"
                }
            ],
            "fixed_packages": [
                {
                    "url": "http://public2.vulnerablecode.io/api/packages/65210?format=api",
                    "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"
                }
            ],
            "aliases": [
                "GHSA-46fp-8f5p-pf2m"
            ],
            "risk_score": 1.4,
            "exploitability": "0.5",
            "weighted_severity": "2.7",
            "resource_url": "http://public2.vulnerablecode.io/vulnerabilities/VCID-amsh-qpt1-9qb7"
        }
    ],
    "fixing_vulnerabilities": [],
    "risk_score": "1.4",
    "resource_url": "http://public2.vulnerablecode.io/packages/pkg:gem/loofah@2.21.0.rc1"
}