Simple Machines Forum < 1.1.3 PHPSESSIONID Cookie Session Hijacking

Medium Nessus Network Monitor Plugin ID 4101


The remote host is vulnerable to a predictable ID flaw that allows hijacking of user accounts.


The remote host is running the Simple Machines Forum (SMF), a web forum. This version of SMF is vulnerable to a flaw in the way that it handles 'PHPSESSIONID' cookie data. Specifically, if an attacker can convince a user to browse a malicious URI with a predefined 'PHPSESSIONID', the attacker can impersonate the user and hijack their account. Successful exploitation would lead to the attacker gaining full access to the targeted account.


Upgrade to version 1.1.3 or higher.

See Also

Plugin Details

Severity: Medium

ID: 4101

Family: CGI

Published: 2007/06/15

Modified: 2016/02/05

Dependencies: 1442

Risk Information

Risk Factor: Medium


Base Score: 4.3

Temporal Score: 3.6

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

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


Base Score: 4.1

Temporal Score: 3.8


Temporal Vector: CVSS3#E:F/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:simplemachines:simple_machines_forum

Reference Information

CVE: CVE-2007-2546

BID: 24482