Quantum Secular Labs / Blog / Advisories

CVE-2018-8711: Woocommerce Filter Woocommerce Products Filter: Improper Input Validation

CVE-2018-8711 is rated critical with a CVSS v3.0 base score of 9.8 and affects Woocommerce Filter Woocommerce Products Filter. Per its scoring, it can be exploited over the network, without authentication, without any user interaction. The scored impact on confidentiality, integrity and availability is the highest available.

Vulnerability description

A local file inclusion issue was discovered in the WooCommerce Products Filter (aka WOOF) plugin before 2.2.0 for WordPress, as demonstrated by the shortcode parameter in a woof_redraw_woof action. The vulnerability is due to the lack of args/input validation on render_html before allowing it to be called by extract(), a PHP built-in function. Because of this, the supplied args/input can be used to overwrite the $pagepath variable, which then could lead to a local file inclusion attack.

Severity breakdown

CVSS v3.0 9.8: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

  • Attack vector: Network. Exploitable remotely over the network, with no need for local or physical access.
  • Attack complexity: Low. No special conditions; the attack can be repeated reliably.
  • Privileges required: None. No account or prior access is needed.
  • User interaction: None. No action from any user is needed.
  • Scope: Unchanged. Impact stays within the vulnerable component.
  • Confidentiality impact: High. Total loss of confidentiality; sensitive data can be fully disclosed.
  • Integrity impact: High. Total loss of integrity; data or system state can be fully modified.
  • Availability impact: High. Total loss of availability; the component can be shut down.

Underlying weakness

CWE-20: Improper Input Validation

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

Affected products

  • Woocommerce Filter Woocommerce Products Filter: before 2.2.0

References