Lookup for vulnerabilities affecting packages.

GET /api/vulnerabilities/41713?format=api
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{
    "url": "http://public2.vulnerablecode.io/api/vulnerabilities/41713?format=api",
    "vulnerability_id": "VCID-7tgb-99ck-kkg6",
    "summary": "Exposure of Sensitive Information to an Unauthorized Actor\nrails_multisite provides multi-db support for Rails applications.Depending on how the application makes use of these cookies, it may be possible for an attacker to re-use cookies on different 'sites' within a multi-site Rails application. The issue has been patched in v4 of the `rails_multisite` gem. Note that this upgrade will invalidate all previous signed/encrypted cookies. The impact of this invalidation will vary based on the application architecture.",
    "aliases": [
        {
            "alias": "CVE-2021-41263"
        },
        {
            "alias": "GHSA-844m-cpr9-jcmh"
        }
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    "references": [
        {
            "reference_url": "https://api.first.org/data/v1/epss?cve=CVE-2021-41263",
            "reference_id": "",
            "reference_type": "",
            "scores": [
                {
                    "value": "0.00198",
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                    "scoring_elements": "0.41676",
                    "published_at": "2026-06-04T12:55:00Z"
                }
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            "reference_id": "",
            "reference_type": "",
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                    "scoring_elements": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:L/A:H"
                },
                {
                    "value": "MODERATE",
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                    "scoring_elements": ""
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            "url": "https://github.com/discourse/rails_multisite"
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            "reference_type": "",
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            "reference_id": "",
            "reference_type": "",
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            "url": "https://github.com/rubysec/ruby-advisory-db/blob/master/gems/rails_multisite/CVE-2021-41263.yml"
        },
        {
            "reference_url": "https://nvd.nist.gov/vuln/detail/CVE-2021-41263",
            "reference_id": "CVE-2021-41263",
            "reference_type": "",
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            "reference_id": "GHSA-844m-cpr9-jcmh",
            "reference_type": "",
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    "weaknesses": [
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            "cwe_id": 1035,
            "name": "OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities",
            "description": "Weaknesses in this category are related to the A9 category in the OWASP Top Ten 2017."
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        {
            "cwe_id": 327,
            "name": "Use of a Broken or Risky Cryptographic Algorithm",
            "description": "The product uses a broken or risky cryptographic algorithm or protocol."
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        {
            "cwe_id": 937,
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            "description": "Weaknesses in this category are related to the A9 category in the OWASP Top Ten 2013."
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        {
            "cwe_id": 200,
            "name": "Exposure of Sensitive Information to an Unauthorized Actor",
            "description": "The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information."
        },
        {
            "cwe_id": 565,
            "name": "Reliance on Cookies without Validation and Integrity Checking",
            "description": "The product relies on the existence or values of cookies when performing security-critical operations, but it does not properly ensure that the setting is valid for the associated user."
        }
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    "exploits": [],
    "severity_range_score": "4.0 - 6.9",
    "exploitability": "0.5",
    "weighted_severity": "6.2",
    "risk_score": 3.1,
    "resource_url": "http://public2.vulnerablecode.io/vulnerabilities/VCID-7tgb-99ck-kkg6"
}