CVE-2015-6835

CRITICAL

Joomla HTTP Header Unauthenticated Remote Code Execution

Title source: metasploit

Description

The session deserializer in PHP before 5.4.45, 5.5.x before 5.5.29, and 5.6.x before 5.6.13 mishandles multiple php_var_unserialize calls, which allow remote attackers to execute arbitrary code or cause a denial of service (use-after-free) via crafted session content.

Exploits (3)

exploitdb WORKING POC VERIFIED
by Taoguang Chen · textdosphp
https://www.exploit-db.com/exploits/38123
nomisec WORKING POC 3 stars
by ockeghem · poc
https://github.com/ockeghem/CVE-2015-6835-checker
metasploit WORKING POC EXCELLENT
by Marc-Alexandre Montpas, Christian Mehlmauer · rubypocphp
https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/multi/http/joomla_http_header_rce.rb

Scores

CVSS v3 9.8
EPSS 0.2130
EPSS Percentile 95.7%
Attack Vector NETWORK
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

Status published
Products (30)
php/php 5.6.0 alpha1 (9 CPE variants)
php/php 5.6.1
php/php 5.6.2
php/php 5.6.3
php/php 5.6.4
php/php 5.6.5
php/php 5.6.6
php/php 5.6.7
php/php 5.6.8
php/php 5.6.9
... and 20 more
Published May 16, 2016
Tracked Since Feb 18, 2026