{"url":"http://public2.vulnerablecode.io/api/packages/550206?format=json","purl":"pkg:maven/org.pac4j/pac4j-saml@1.8.0","type":"maven","namespace":"org.pac4j","name":"pac4j-saml","version":"1.8.0","qualifiers":{},"subpath":"","is_vulnerable":true,"next_non_vulnerable_version":"4.5.5","latest_non_vulnerable_version":"5.3.1","affected_by_vulnerabilities":[{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/41989?format=json","vulnerability_id":"VCID-mcvx-6zuz-mkcy","summary":"Improper Verification of Cryptographic Signature\nPac4j v5.1 allows (by default) clients to accept and successfully validate ID Tokens with `none` algorithm (i.e., tokens with no signature) which is not secure and violates the OpenID Core Specification. The `none` algorithm does not require any signature verification when validating the ID tokens, which allows the attacker to bypass the token validation by injecting a malformed ID token using `none` as the value of `alg` key in the header with an empty signature value.","references":[{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2021-44878","reference_id":"","reference_type":"","scores":[{"value":"0.00139","scoring_system":"epss","scoring_elements":"0.33628","published_at":"2026-06-04T12:55:00Z"},{"value":"0.00139","scoring_system":"epss","scoring_elements":"0.33698","published_at":"2026-06-09T12:55:00Z"},{"value":"0.00139","scoring_system":"epss","scoring_elements":"0.33673","published_at":"2026-06-08T12:55:00Z"},{"value":"0.00139","scoring_system":"epss","scoring_elements":"0.33708","published_at":"2026-06-07T12:55:00Z"},{"value":"0.00139","scoring_system":"epss","scoring_elements":"0.33742","published_at":"2026-06-06T12:55:00Z"},{"value":"0.00139","scoring_system":"epss","scoring_elements":"0.33729","published_at":"2026-06-05T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2021-44878"},{"reference_url":"https://github.com/pac4j/pac4j","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/pac4j/pac4j"},{"reference_url":"https://github.com/pac4j/pac4j/commit/09684e0de1c4753d22c53b8135d4ef61cfda76f7","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/pac4j/pac4j/commit/09684e0de1c4753d22c53b8135d4ef61cfda76f7"},{"reference_url":"https://github.com/pac4j/pac4j/commit/22b82ffd702a132d9f09da60362fc6264fc281ae","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/pac4j/pac4j/commit/22b82ffd702a132d9f09da60362fc6264fc281ae"},{"reference_url":"https://github.com/pac4j/pac4j/commit/9c87bbc536ed5d05f940ae015403120df2935589","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/pac4j/pac4j/commit/9c87bbc536ed5d05f940ae015403120df2935589"},{"reference_url":"https://openid.net/specs/openid-connect-core-1_0.html#IDToken","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://openid.net/specs/openid-connect-core-1_0.html#IDToken"},{"reference_url":"https://www.pac4j.org/4.5.x/docs/release-notes.html","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://www.pac4j.org/4.5.x/docs/release-notes.html"},{"reference_url":"https://www.pac4j.org/blog/cve_2021_44878_is_this_serious.html","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://www.pac4j.org/blog/cve_2021_44878_is_this_serious.html"},{"reference_url":"https://nvd.nist.gov/vuln/detail/CVE-2021-44878","reference_id":"CVE-2021-44878","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-44878"},{"reference_url":"https://github.com/advisories/GHSA-xhw6-hjc9-679m","reference_id":"GHSA-xhw6-hjc9-679m","reference_type":"","scores":[{"value":"HIGH","scoring_system":"cvssv3.1_qr","scoring_elements":""}],"url":"https://github.com/advisories/GHSA-xhw6-hjc9-679m"}],"fixed_packages":[{"url":"http://public2.vulnerablecode.io/api/packages/60038?format=json","purl":"pkg:maven/org.pac4j/pac4j-saml@4.5.5","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:maven/org.pac4j/pac4j-saml@4.5.5"},{"url":"http://public2.vulnerablecode.io/api/packages/60039?format=json","purl":"pkg:maven/org.pac4j/pac4j-saml@5.3.1","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:maven/org.pac4j/pac4j-saml@5.3.1"}],"aliases":["CVE-2021-44878","GHSA-xhw6-hjc9-679m"],"risk_score":4.0,"exploitability":"0.5","weighted_severity":"8.0","resource_url":"http://public2.vulnerablecode.io/vulnerabilities/VCID-mcvx-6zuz-mkcy"}],"fixing_vulnerabilities":[],"risk_score":"4.0","resource_url":"http://public2.vulnerablecode.io/packages/pkg:maven/org.pac4j/pac4j-saml@1.8.0"}