{"cve":"CVE-2015-8562","nvd":{"published":"2015-12-16T21:59:06.390","modified":"2026-06-17T00:34:46.897","status":"Modified","description":"Joomla! 1.5.x, 2.x, and 3.x before 3.4.6 allow remote attackers to conduct PHP object injection attacks and execute arbitrary PHP code via the HTTP User-Agent header, as exploited in the wild in December 2015.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-20"],"references":["http://packetstormsecurity.com/files/134949/Joomla-HTTP-Header-Unauthenticated-Remote-Code-Execution.html","http://packetstormsecurity.com/files/135100/Joomla-3.4.5-Object-Injection.html","http://www.rapid7.com/db/modules/exploit/multi/http/joomla_http_header_rce","http://www.securityfocus.com/archive/1/537219/100/0/threaded","http://www.securityfocus.com/bid/79195"],"products":["joomla:joomla\\!"],"source":"nvd","synced_at":"2026-10-19T20:37:48.328043465+00:00"},"epss":{"cve":"CVE-2015-8562","score":0.98193,"percentile":0.99914,"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."]}