It was discovered that PHP incorrectly handled certain scripts. An attacker could possibly use this issue to cause a denial of service, or possibly execute arbitrary code.
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{ "ecosystem": "Ubuntu:20.04:LTS", "cves": [ { "id": "CVE-2021-21708", "severity": [ { "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "type": "CVSS_V3" }, { "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L", "type": "CVSS_V3" }, { "score": "medium", "type": "Ubuntu" } ] } ] }