{"schemaVersion":3,"id":"CVE-2013-3735","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"The Zend Engine in PHP before 5.4.16 RC1, and 5.5.0 before RC2, does not properly determine whether a parser error occurred, which allows context-dependent attackers to cause a denial of service (memory consumption and application crash) via a crafted function definition, as demonstrated by an attack within a shared web-hosting environment.  NOTE: the vendor's http://php.net/security-note.php page says \"for critical security situations you should be using OS-level security by running multiple web servers each as their own user id.","dates":{"published":"2013-05-31T21:00:00.000Z","modified":"2025-01-16T20:30:29.631Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":7.5,"severity":"high","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":7.5,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":7.5,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","exploitability":null,"impact":null,"computed":false},{"version":"2.0","versionLabel":"v2.0","source":"NVD","score":5,"severity":"medium","vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.02832,"percentile":0.86447,"severity":"low","asOf":"2026-10-20T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-20T00:00:00.000Z","baselineScore":0.02832},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.02832,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.02832,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.02832,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.02832,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.02832,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.02832,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.02832,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.02832,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.02832,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.02832,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.02832,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.02832,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.02832,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.02832,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.02832,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.02832,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.02832,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.02832,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.02832,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.02832,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.02832,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.02832,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.02832,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.02832,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.02832,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.02832,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.02832,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.02832,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.02832,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.02832,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.02832,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.02832,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.02832,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.02832,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.02832,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.02832,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.02832,"percentile":0.86447}],"last30":[{"date":"2026-09-20T00:00:00.000Z","score":0.02832,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.02832,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.02832,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.02832,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.02832,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.02832,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.02832,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.02832,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.02832,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.02832,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.02832,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.02832,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.02832,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.02832,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.02832,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.02832,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.02832,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.02832,"percentile":null},{"date":"2026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