CVE-2014-9463

published 2017-09-15

CVE-2014-9463: functions_vbseo_hook.php in the VBSEO module for vBulletin allows remote authenticated users to execute arbitrary code via the HTTP Referer header to…

Priority P2 68 high 8.8 CVSS 3.0

AV N AC L PR L UI N S U C H I H A H

EXPLOIT

functions_vbseo_hook.php in the VBSEO module for vBulletin allows remote authenticated users to execute arbitrary code via the HTTP Referer header to visitormessage.php.

Detection & IOCs extracted from sources · hover to see the quote

url http://server/visitormessage.php?do=message↗

path /visitormessage.php↗

filename functions_vbseo_hook.php↗

filename shell.php↗

command $stylevar[${${file_put_contents("shell.php","hacked")}}]↗

• → Exploit is delivered via a malicious HTTP Referer header containing PHP variable-variable injection payload targeting the $stylevar array; monitor Referer headers for patterns matching $stylevar[${${...}}] ↗
• → POST requests to visitormessage.php?do=message with a Referer header containing file_put_contents() calls should be treated as active exploitation attempts ↗
• → Attacker drops a webshell (shell.php, downloader.php, s.php) in the web root; monitor for unexpected PHP file creation in the vBulletin document root following POST requests to visitormessage.php ↗

• · Exploitation requires the attacker to be a registered, authenticated user on the vBulletin instance; unauthenticated exploitation is not possible ↗
• · The exploit was tested specifically against vBulletin 4.2.2 with the VBSEO 4.x module; other versions may behave differently ↗

CVSS provenance

nvd v3.0 8.8 HIGH CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

nvd v2.0 9.0 CRITICAL AV:N/AC:L/Au:S/C:C/I:C/A:C

CVEs like this are exactly what “Exploited This Week” covers.

Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.

CWE-94