Lookup for vulnerable packages by Package URL.

GET /api/packages/29057?format=api
HTTP 200 OK
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Content-Type: application/json
Vary: Accept

{
    "url": "http://public2.vulnerablecode.io/api/packages/29057?format=api",
    "purl": "pkg:composer/symfony/security-guard@2.8.41",
    "type": "composer",
    "namespace": "symfony",
    "name": "security-guard",
    "version": "2.8.41",
    "qualifiers": {},
    "subpath": "",
    "is_vulnerable": true,
    "next_non_vulnerable_version": "3.4.48",
    "latest_non_vulnerable_version": "5.2.8",
    "affected_by_vulnerabilities": [
        {
            "url": "http://public2.vulnerablecode.io/api/vulnerabilities/47309?format=api",
            "vulnerability_id": "VCID-e71e-d4tr-wqgz",
            "summary": "Prevent user enumeration using Guard or the new Authenticator-based Security\nDescription\n-----------\n\nThe ability to enumerate users was possible without relevant permissions due to different exception messages depending on whether the user existed or not. It was also possible to enumerate users by using a timing attack, by comparing time elapsed when authenticating an existing user and authenticating a non-existing user.\n\nResolution\n----------\n\nWe now ensure that 403s are returned whether the user exists or not if the password is invalid or if the user does not exist.\n\nThe patch for this issue is available [here](https://github.com/symfony/symfony/commit/2a581d22cc621b33d5464ed65c4bc2057f72f011) for branch 3.4.\n\nCredits\n-------\n\nI would like to thank James Isaac and Mathias Brodala for reporting the issue and Robin Chalas for fixing the issue.",
            "references": [
                {
                    "reference_url": "https://api.first.org/data/v1/epss?cve=CVE-2021-21424",
                    "reference_id": "",
                    "reference_type": "",
                    "scores": [
                        {
                            "value": "0.00266",
                            "scoring_system": "epss",
                            "scoring_elements": "0.50055",
                            "published_at": "2026-04-02T12:55:00Z"
                        },
                        {
                            "value": "0.00266",
                            "scoring_system": "epss",
                            "scoring_elements": "0.50068",
                            "published_at": "2026-04-13T12:55:00Z"
                        },
                        {
                            "value": "0.00266",
                            "scoring_system": "epss",
                            "scoring_elements": "0.50072",
                            "published_at": "2026-04-12T12:55:00Z"
                        },
                        {
                            "value": "0.00266",
                            "scoring_system": "epss",
                            "scoring_elements": "0.50098",
                            "published_at": "2026-04-11T12:55:00Z"
                        },
                        {
                            "value": "0.00266",
                            "scoring_system": "epss",
                            "scoring_elements": "0.50081",
                            "published_at": "2026-04-09T12:55:00Z"
                        },
                        {
                            "value": "0.00266",
                            "scoring_system": "epss",
                            "scoring_elements": "0.50088",
                            "published_at": "2026-04-08T12:55:00Z"
                        },
                        {
                            "value": "0.00266",
                            "scoring_system": "epss",
                            "scoring_elements": "0.50017",
                            "published_at": "2026-04-01T12:55:00Z"
                        },
                        {
                            "value": "0.00266",
                            "scoring_system": "epss",
                            "scoring_elements": "0.50033",
                            "published_at": "2026-04-07T12:55:00Z"
                        },
                        {
                            "value": "0.00266",
                            "scoring_system": "epss",
                            "scoring_elements": "0.50083",
                            "published_at": "2026-04-04T12:55:00Z"
                        }
                    ],
                    "url": "https://api.first.org/data/v1/epss?cve=CVE-2021-21424"
                },
                {
                    "reference_url": "https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21424",
                    "reference_id": "",
                    "reference_type": "",
                    "scores": [],
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                {
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                    "reference_id": "",
                    "reference_type": "",
                    "scores": [
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                            "value": "5.3",
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                            "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"
                        },
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                            "value": "MODERATE",
                            "scoring_system": "generic_textual",
                            "scoring_elements": ""
                        }
                    ],
                    "url": "https://github.com/FriendsOfPHP/security-advisories/blob/master/lexik/jwt-authentication-bundle/CVE-2021-21424.yaml"
                },
                {
                    "reference_url": "https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/maker-bundle/CVE-2021-21424.yaml",
                    "reference_id": "",
                    "reference_type": "",
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                        },
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                        }
                    ],
                    "url": "https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/maker-bundle/CVE-2021-21424.yaml"
                },
                {
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                    "reference_id": "",
                    "reference_type": "",
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                        },
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                            "scoring_system": "generic_textual",
                            "scoring_elements": ""
                        }
                    ],
                    "url": "https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/security/CVE-2021-21424.yaml"
                },
                {
                    "reference_url": "https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/security-guard/CVE-2021-21424.yaml",
                    "reference_id": "",
                    "reference_type": "",
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                        },
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                            "value": "MODERATE",
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                            "scoring_elements": ""
                        }
                    ],
                    "url": "https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/security-guard/CVE-2021-21424.yaml"
                },
                {
                    "reference_url": "https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/security-http/CVE-2021-21424.yaml",
                    "reference_id": "",
                    "reference_type": "",
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                        },
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                        }
                    ],
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                },
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                    "reference_type": "",
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                            "value": "MODERATE",
                            "scoring_system": "generic_textual",
                            "scoring_elements": ""
                        }
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                    "url": "https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2021-21424.yaml"
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                    "reference_url": "https://github.com/symfony/symfony",
                    "reference_id": "",
                    "reference_type": "",
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                        },
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                    "url": "https://github.com/symfony/symfony"
                },
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                    "reference_url": "https://lists.debian.org/debian-lts-announce/2023/07/msg00014.html",
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                {
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                },
                {
                    "reference_url": "https://nvd.nist.gov/vuln/detail/CVE-2021-21424",
                    "reference_id": "",
                    "reference_type": "",
                    "scores": [
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                    ],
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                },
                {
                    "reference_url": "https://symfony.com/cve-2021-21424",
                    "reference_id": "",
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                    "scores": [
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                {
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                    "reference_id": "GHSA-5pv8-ppvj-4h68",
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                    "scores": [
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                {
                    "reference_url": "https://usn.ubuntu.com/USN-5290-1/",
                    "reference_id": "USN-USN-5290-1",
                    "reference_type": "",
                    "scores": [],
                    "url": "https://usn.ubuntu.com/USN-5290-1/"
                }
            ],
            "fixed_packages": [
                {
                    "url": "http://public2.vulnerablecode.io/api/packages/77043?format=api",
                    "purl": "pkg:composer/symfony/security-guard@3.4.48",
                    "is_vulnerable": false,
                    "affected_by_vulnerabilities": [],
                    "resource_url": "http://public2.vulnerablecode.io/packages/pkg:composer/symfony/security-guard@3.4.48"
                },
                {
                    "url": "http://public2.vulnerablecode.io/api/packages/77045?format=api",
                    "purl": "pkg:composer/symfony/security-guard@4.4.23",
                    "is_vulnerable": false,
                    "affected_by_vulnerabilities": [],
                    "resource_url": "http://public2.vulnerablecode.io/packages/pkg:composer/symfony/security-guard@4.4.23"
                },
                {
                    "url": "http://public2.vulnerablecode.io/api/packages/77046?format=api",
                    "purl": "pkg:composer/symfony/security-guard@5.2.8",
                    "is_vulnerable": false,
                    "affected_by_vulnerabilities": [],
                    "resource_url": "http://public2.vulnerablecode.io/packages/pkg:composer/symfony/security-guard@5.2.8"
                }
            ],
            "aliases": [
                "CVE-2021-21424",
                "GHSA-5pv8-ppvj-4h68"
            ],
            "risk_score": 3.1,
            "exploitability": "0.5",
            "weighted_severity": "6.2",
            "resource_url": "http://public2.vulnerablecode.io/vulnerabilities/VCID-e71e-d4tr-wqgz"
        }
    ],
    "fixing_vulnerabilities": [
        {
            "url": "http://public2.vulnerablecode.io/api/vulnerabilities/9447?format=api",
            "vulnerability_id": "VCID-71vh-7wte-kfcx",
            "summary": "Session Fixation\nA session fixation vulnerability within the `Guard` login feature may allow an attacker to impersonate a victim towards the web application if the session id value was previously known to the attacker.",
            "references": [
                {
                    "reference_url": "https://api.first.org/data/v1/epss?cve=CVE-2018-11385",
                    "reference_id": "",
                    "reference_type": "",
                    "scores": [
                        {
                            "value": "0.00904",
                            "scoring_system": "epss",
                            "scoring_elements": "0.75652",
                            "published_at": "2026-04-02T12:55:00Z"
                        },
                        {
                            "value": "0.00904",
                            "scoring_system": "epss",
                            "scoring_elements": "0.75707",
                            "published_at": "2026-04-13T12:55:00Z"
                        },
                        {
                            "value": "0.00904",
                            "scoring_system": "epss",
                            "scoring_elements": "0.75713",
                            "published_at": "2026-04-12T12:55:00Z"
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