{"cve":"CVE-2013-3735","nvd":{"published":"2013-05-31T21:55:01.230","modified":"2026-06-16T23:55:41.740","status":"Modified","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-20"],"references":["https://bugs.php.net/bug.php?id=64660","https://github.com/php/php-src/blob/php-5.4.16RC1/NEWS","https://github.com/php/php-src/blob/php-5.5.0RC2/NEWS","https://github.com/php/php-src/commit/fb58e69a84f4fde603a630d2c9df2fa3be16d846","https://bugs.php.net/bug.php?id=64660"],"products":["php:php"],"source":"nvd","synced_at":"2026-10-19T20:29:16.037019470+00:00"},"epss":{"cve":"CVE-2013-3735","score":0.02832,"percentile":0.86632,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}