CVE-2019-9055

published 2019-03-26

CVE-2019-9055: An issue was discovered in CMS Made Simple 2.2.8. In the module DesignManager (in the files action.admin_bulk_css.php and action.admin_bulk_template.php), with…

Priority P2 64 high 8.8 CVSS 3.0

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

EXPLOIT

An issue was discovered in CMS Made Simple 2.2.8. In the module DesignManager (in the files action.admin_bulk_css.php and action.admin_bulk_template.php), with an unprivileged user with Designer permission, it is possible reach an unserialize call with a crafted value in the m1_allparms parameter, and achieve object injection.

Affected

1 ranges

Vendor	Product	Version range	Fixed in
cmsmadesimple	cms_made_simple	<= 2.2.8	—

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

other m1_allparms↗

path action.admin_bulk_css.php↗

path action.admin_bulk_template.php↗

• → Monitor HTTP requests targeting the DesignManager module endpoints (action.admin_bulk_css.php, action.admin_bulk_template.php) for the presence of the m1_allparms parameter containing serialized PHP object payloads (e.g., values beginning with 'O:' or 'a:' typical of PHP serialization). ↗
• → Exploitation requires an authenticated session with Designer-level privileges; alert on Designer-role accounts making POST requests to DesignManager bulk action endpoints. ↗
• → Affected versions include CMS Made Simple 2.2.6, 2.2.7, 2.2.8, 2.2.9, and 2.2.9.1; prioritize detection on installations running these versions. ↗

• · Exploitation is limited to authenticated users holding the Designer role; unauthenticated exploitation is not possible. ↗

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 6.5 MEDIUM AV:N/AC:L/Au:S/C:P/I:P/A:P

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