Ultimate Form Builder Lite <= 1.3.6 - SQL Injection to PHP Object Injection
Strategic Overview
- Status
- Patched in 1.3.7
- Affected Plugin
- Contact Form for WordPress – Ultimate Form Builder Lite
- Affected Version
< 1.3.7- CVSS
- 9.8Critical
- Weakness type
- CWE-89 · Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
- CVE
CVE-2017-15919
At a glance
CVE-2017-15919 is a critical-severity Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in the Contact Form for WordPress WordPress plugin, affecting versions < 1.3.7. It carries a CVSS score of 9.8 (reachable over the network; low attack complexity; high confidentiality, integrity, availability impact). Exploitation requires no authentication. The issue is fixed in version 1.3.7; sites on affected versions should update now. Disclosed October 2017.
Vulnerability Overview
The ultimate-form-builder-lite plugin before 1.3.7 for WordPress has SQL Injection, with resultant PHP Object Injection, via wp-admin/admin-ajax.php.
Technical Analysis
The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site, and no interaction from a victim user. A successful exploit has high impact on confidentiality, integrity, availability — full site compromise territory.
CWE-89: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
Reaching this weakness in Contact Form for WordPress < 1.3.7 takes a caller who can reach the endpoint. SQL injection happens when request data is concatenated into a query instead of being bound as a parameter, letting an attacker change the structure of the statement rather than just its values.
A working injection can read any table the database user can see, which on a WordPress install means user records, password hashes and session or API secrets stored in options. For Contact Form for WordPress the fix is 1.3.7: builds < 1.3.7 are affected, anything from 1.3.7 onward is not.
Remediation
Update to version 1.3.7, or a newer patched version
How does WordSec protect against this?
The attempt arrives as an ordinary request to Contact Form for WordPress: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Contact Form for WordPress 1.3.7 closes this, and updating the plugin is the step that ends it.
- Firewall
- Alerts
External References
Related records
Other vulnerabilities in Contact Form for WordPress – Ultimate Form Builder Lite
Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C