CVE & CISA-KEV CatalogNVD
CVE-2015-8562
HIGHEPSS 100th pctl7.5
CVSS v2
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 v2 Vector
No CVSS vector data available.
Exploit Intelligence
98.28%probability of exploitation in 30 days
100thpercentile
Very high risk: more likely to be exploited than 100% of all known CVEs.
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
- https://blog.sucuri.net/2015/12/remote-command-execution-vulnerability-in-joomla.html
- https://developer.joomla.org/security-centre/630-20151214-core-remote-code-execution-vulnerability.html
- https://www.exploit-db.com/exploits/38977/
- https://www.exploit-db.com/exploits/39033/
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Start freeThis product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-06.