{"cve":"CVE-2011-3379","nvd":{"published":"2011-11-03T15:55:00.840","modified":"2026-06-16T23:33:11.337","status":"Modified","description":"The is_a function in PHP 5.3.7 and 5.3.8 triggers a call to the __autoload function, which makes it easier for remote attackers to execute arbitrary code by providing a crafted URL and leveraging potentially unsafe behavior in certain PEAR packages and custom autoloaders.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-94"],"references":["http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c03360041","http://securityreason.com/securityalert/8525","http://svn.php.net/viewvc/?view=revision&revision=317183","http://www.byte.nl/blog/2011/09/23/security-bug-in-is_a-function-in-php-5-3-7-5-3-8/","http://www.securityfocus.com/archive/1/519770/30/0/threaded"],"products":["php:php"],"source":"nvd","synced_at":"2026-10-19T19:59:31.623151214+00:00"},"epss":{"cve":"CVE-2011-3379","score":0.0501,"percentile":0.92245,"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."]}