CVE-2015-8562

NONECVSS 0.09.0▲Weaponized

0.0

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 v3: —
EG Score: 9.0(low)
EPSS: 99.8%
KEV: Not listed

Published

December 16, 2015

Last Modified

May 6, 2026

References (18)

cve@mitrehttp://packetstormsecurity.com/files/134949/Joomla-HTTP-Header-Unauthenticated-Remote-Code-Execution.html
cve@mitrehttp://packetstormsecurity.com/files/135100/Joomla-3.4.5-Object-Injection.html
cve@mitrehttp://www.rapid7.com/db/modules/exploit/multi/http/joomla_http_header_rce
cve@mitrehttp://www.securityfocus.com/archive/1/537219/100/0/threaded
cve@mitrehttp://www.securityfocus.com/bid/79195
cve@mitrehttps://blog.sucuri.net/2015/12/remote-command-execution-vulnerability-in-joomla.html
cve@mitrehttps://developer.joomla.org/security-centre/630-20151214-core-remote-code-execution-vulnerability.html
cve@mitrehttps://www.exploit-db.com/exploits/38977/
cve@mitrehttps://www.exploit-db.com/exploits/39033/
af854a3a-2127-422b-91ae-364da2661108http://packetstormsecurity.com/files/134949/Joomla-HTTP-Header-Unauthenticated-Remote-Code-Execution.html
af854a3a-2127-422b-91ae-364da2661108http://packetstormsecurity.com/files/135100/Joomla-3.4.5-Object-Injection.html
af854a3a-2127-422b-91ae-364da2661108http://www.rapid7.com/db/modules/exploit/multi/http/joomla_http_header_rce
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/archive/1/537219/100/0/threaded
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/79195
af854a3a-2127-422b-91ae-364da2661108https://blog.sucuri.net/2015/12/remote-command-execution-vulnerability-in-joomla.html

Data Freshness Timeline

(refreshed 2× in last 7d / 14× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

2026-06-08 14:14 UTCEPSS rescore
2026-06-05 22:44 UTCEPSS rescore
2026-05-31 00:14 UTCEPSS rescore
2026-05-29 13:41 UTCEPSS rescore
2026-05-28 13:42 UTCEPSS rescore
2026-05-28 13:42 UTCEPSS rescore
2026-05-27 13:38 UTCEPSS rescore
2026-05-27 13:38 UTCEPSS rescore
2026-05-22 22:11 UTCEG score recompute
2026-05-22 22:11 UTCGHSA enrichment
2026-05-20 22:37 UTCEPSS rescore
2026-05-20 22:37 UTCEPSS rescore
2026-05-18 21:30 UTCEPSS rescore
2026-05-18 21:30 UTCEPSS rescore

Publicly available exploits

(8 references)

Working exploit code is in the public domain (1 Metasploit module) (4 GitHub PoCs) (2 Exploit-DB entries). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

GitHub PoCVoidSec/Joomla_CVE-2015-8562
First seen Sep 17, 2017
A proof of concept for Joomla's CVE-2015-8562 vulnerability (Object Injection RCE)
Open source ↗
GitHub PoCparalelo14/CVE-2015-8562
First seen Jan 8, 2017
Joomla 1.5 - 3.4.5 Object Injection RCE X-Forwarded-For header
Open source ↗
GitHub PoCRobinHoutevelts/Joomla-CVE-2015-8562-PHP-POC
First seen Jan 4, 2016
A proof of concept for Joomla's CVE-2015-8562 vulnerability
Open source ↗
GitHub PoCZaleHack/joomla_rce_CVE-2015-8562
First seen Jan 4, 2016
All versions of the Joomla! below 3.4.6 are known to be vulnerable. But exploitation is possible with PHP versions below 5.5.29, 5.6.13 and below 5.5.
Open source ↗
Exploit-DBEDB-39033
First seen Dec 18, 2015
Joomla! 1.5 < 3.4.6 - Object Injection 'x-forwarded-for' Header Remote Code Execution
Open source ↗
Exploit-DBEDB-38977✓ verified
First seen Dec 15, 2015
Joomla! 1.5 < 3.4.5 - Object Injection Remote Command Execution
Open source ↗
Metasploitexploit/multi/http/joomla_http_header_rce✓ verified
First seen Dec 14, 2015
Joomla HTTP Header Unauthenticated Remote Code Execution
Open source ↗
Nucleihttp/cves/2015/CVE-2015-8562.yaml
First seen Jan 1, 2015
Joomla HTTP Header Unauthenticated - Remote Code Execution
Open source ↗

Frequently asked(4)

What is CVE-2015-8562?

CVE-2015-8562 is a none vulnerability published on December 16, 2015. 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.

When was CVE-2015-8562 disclosed?

CVE-2015-8562 was first published in the National Vulnerability Database on December 16, 2015, with the most recent update on May 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2015-8562 actively exploited?

CVE-2015-8562 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 99.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

How do I remediate CVE-2015-8562?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2015-8562, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2015-8562

📅 Published

🔄 Last Modified

🔗 References (18)