Vulnerability Instance
Lookup for vulnerabilities affecting packages.
GET /api/vulnerabilities/52423?format=api
{ "url": "http://public2.vulnerablecode.io/api/vulnerabilities/52423?format=api", "vulnerability_id": "VCID-pbyw-b4bw-uuhk", "summary": "Authentication Bypass by Capture-replay\nSaml2 Authentication services for ASP.NET (NuGet package Sustainsys.Saml2) has a faulty implementation of Token Replay Detection. Token Replay Detection is an important defence in depth measure for Single Sign On solutions.", "aliases": [ { "alias": "CVE-2020-5261" }, { "alias": "GHSA-g6j2-ch25-5mmv" } ], "fixed_packages": [ { "url": "http://public2.vulnerablecode.io/api/packages/76965?format=api", "purl": "pkg:nuget/Sustainsys.Saml2@2.5.0", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-caea-y5bm-zked" }, { "vulnerability": "VCID-v3bx-f3um-8ubc" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:nuget/Sustainsys.Saml2@2.5.0" } ], "affected_packages": [ { "url": "http://public2.vulnerablecode.io/api/packages/67058?format=api", "purl": "pkg:nuget/Sustainsys.Saml2@2.0.0", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-caea-y5bm-zked" }, { "vulnerability": "VCID-pbyw-b4bw-uuhk" }, { "vulnerability": "VCID-v3bx-f3um-8ubc" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:nuget/Sustainsys.Saml2@2.0.0" }, { "url": "http://public2.vulnerablecode.io/api/packages/250893?format=api", "purl": "pkg:nuget/Sustainsys.Saml2@2.1.0", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-caea-y5bm-zked" }, { "vulnerability": "VCID-pbyw-b4bw-uuhk" }, { "vulnerability": "VCID-v3bx-f3um-8ubc" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:nuget/Sustainsys.Saml2@2.1.0" }, { "url": "http://public2.vulnerablecode.io/api/packages/250894?format=api", "purl": "pkg:nuget/Sustainsys.Saml2@2.2.0", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-caea-y5bm-zked" }, { "vulnerability": "VCID-pbyw-b4bw-uuhk" }, { "vulnerability": "VCID-v3bx-f3um-8ubc" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:nuget/Sustainsys.Saml2@2.2.0" }, { "url": "http://public2.vulnerablecode.io/api/packages/250895?format=api", "purl": "pkg:nuget/Sustainsys.Saml2@2.3.0", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-caea-y5bm-zked" }, { "vulnerability": "VCID-pbyw-b4bw-uuhk" }, { "vulnerability": "VCID-v3bx-f3um-8ubc" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:nuget/Sustainsys.Saml2@2.3.0" }, { "url": "http://public2.vulnerablecode.io/api/packages/250896?format=api", "purl": "pkg:nuget/Sustainsys.Saml2@2.4.0", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-caea-y5bm-zked" }, { "vulnerability": "VCID-pbyw-b4bw-uuhk" }, { "vulnerability": "VCID-v3bx-f3um-8ubc" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:nuget/Sustainsys.Saml2@2.4.0" } ], "references": [ { "reference_url": "https://api.first.org/data/v1/epss?cve=CVE-2020-5261", "reference_id": "", "reference_type": "", "scores": [ { "value": "0.00285", "scoring_system": "epss", "scoring_elements": "0.52246", "published_at": "2026-06-04T12:55:00Z" }, { "value": "0.00285", "scoring_system": "epss", "scoring_elements": "0.52264", "published_at": "2026-06-08T12:55:00Z" }, { "value": "0.00285", "scoring_system": "epss", "scoring_elements": "0.52293", "published_at": "2026-06-07T12:55:00Z" }, { "value": "0.00285", "scoring_system": "epss", "scoring_elements": "0.52313", "published_at": "2026-06-06T12:55:00Z" }, { "value": "0.00285", "scoring_system": "epss", "scoring_elements": "0.52305", "published_at": "2026-06-05T12:55:00Z" } ], "url": "https://api.first.org/data/v1/epss?cve=CVE-2020-5261" }, { "reference_url": "https://github.com/Sustainsys/Saml2/commit/e58e0a1aff2b1ead6aca080b7cdced55ee6d5241", "reference_id": "", "reference_type": "", "scores": [ { "value": "8.2", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N" }, { "value": "HIGH", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/Sustainsys/Saml2/commit/e58e0a1aff2b1ead6aca080b7cdced55ee6d5241" }, { "reference_url": "https://github.com/Sustainsys/Saml2/issues/711", "reference_id": "", "reference_type": "", "scores": [ { "value": "8.2", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N" }, { "value": "HIGH", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/Sustainsys/Saml2/issues/711" }, { "reference_url": "https://nvd.nist.gov/vuln/detail/CVE-2020-5261", "reference_id": "CVE-2020-5261", "reference_type": "", "scores": [ { "value": "8.2", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N" }, { "value": "HIGH", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-5261" }, { "reference_url": "https://github.com/advisories/GHSA-g6j2-ch25-5mmv", "reference_id": "GHSA-g6j2-ch25-5mmv", "reference_type": "", "scores": [ { "value": "HIGH", "scoring_system": "cvssv3.1_qr", "scoring_elements": "" } ], "url": "https://github.com/advisories/GHSA-g6j2-ch25-5mmv" }, { "reference_url": "https://github.com/Sustainsys/Saml2/security/advisories/GHSA-g6j2-ch25-5mmv", "reference_id": "GHSA-g6j2-ch25-5mmv", "reference_type": "", "scores": [ { "value": "8.2", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N" }, { "value": "HIGH", "scoring_system": "cvssv3.1_qr", "scoring_elements": "" }, { "value": "HIGH", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/Sustainsys/Saml2/security/advisories/GHSA-g6j2-ch25-5mmv" } ], "weaknesses": [ { "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." }, { "cwe_id": 294, "name": "Authentication Bypass by Capture-replay", "description": "A capture-replay flaw exists when the design of the product makes it possible for a malicious user to sniff network traffic and bypass authentication by replaying it to the server in question to the same effect as the original message (or with minor changes)." }, { "cwe_id": 937, "name": "OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities", "description": "Weaknesses in this category are related to the A9 category in the OWASP Top Ten 2013." } ], "exploits": [], "severity_range_score": "7.0 - 8.9", "exploitability": "0.5", "weighted_severity": "8.0", "risk_score": 4.0, "resource_url": "http://public2.vulnerablecode.io/vulnerabilities/VCID-pbyw-b4bw-uuhk" }