CVE-2015-8562

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.

• CWE-20

• http://packetstormsecurity.com/files/134949/Joomla-HTTP-Header-Unauthenticated-Remote-Code-Execution.htmlExploit
• 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
• https://blog.sucuri.net/2015/12/remote-command-execution-vulnerability-in-joomla.htmlExploit
• https://developer.joomla.org/security-centre/630-20151214-core-remote-code-execution-vulnerability.htmlVendor Advisory
• https://www.exploit-db.com/exploits/38977/Exploit
• https://www.exploit-db.com/exploits/39033/Exploit
• http://packetstormsecurity.com/files/134949/Joomla-HTTP-Header-Unauthenticated-Remote-Code-Execution.htmlExploit
• 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
• https://blog.sucuri.net/2015/12/remote-command-execution-vulnerability-in-joomla.htmlExploit
• https://developer.joomla.org/security-centre/630-20151214-core-remote-code-execution-vulnerability.htmlVendor Advisory
• https://www.exploit-db.com/exploits/38977/Exploit
• https://www.exploit-db.com/exploits/39033/Exploit

Published

Dec 16, 2015

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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