Joomla! User-Agent Object Injection RCE

High Nessus Plugin ID 88489


The remote web server contains a PHP application that is affected by a remote code execution vulnerability.


The Joomla! application running on the remote web server is affected by a remote code execution vulnerability due to improper sanitization of the User-Agent header field when saving session values. An unauthenticated, remote attacker can exploit this, via a serialized PHP object, to execute arbitrary PHP code.


Upgrade to Joomla! version 3.4.6 or later.

See Also

Plugin Details

Severity: High

ID: 88489

File Name: joomla_object_injection.nasl

Version: 1.10

Type: remote

Family: CGI abuses

Published: 2016/01/29

Modified: 2018/06/14

Dependencies: 21142

Risk Information

Risk Factor: High

CVSS v2.0

Base Score: 7.5

Temporal Score: 6.2

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

Temporal Vector: CVSS2#E:F/RL:OF/RC:ND

CVSS v3.0

Base Score: 9.8

Temporal Score: 9

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:F/RL:O/RC:X

Vulnerability Information

CPE: cpe:/a:joomla:joomla\!

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2015/12/14

Vulnerability Publication Date: 2015/12/12

Exploitable With


Core Impact

Metasploit (Joomla HTTP Header Unauthenticated Remote Code Execution)

Reference Information

CVE: CVE-2015-8562

BID: 79195

EDB-ID: 38977, 39033

CWE: 20