Page Builder: KingComposer: Dangerous file upload

Page Builder: KingComposer is affected by dangerous file upload. Exposure depends on how the affected operation is made reachable by the site. Successful exploitation can place attacker-controlled executable content on the server and may lead to full site compromise.

CVE / CNA score 8.8 CVSS 3.1 · security@wordfence.com

NVD score 8.8 CVSS 3.1 · nvd@nist.gov

Component: Page Builder: KingComposer
Plugin slug: kingcomposer
Affected: See vendor advisory
Safe version: See mitigation notes
Published: Jun 07, 2023
Weakness: CWE-434 — Unrestricted Upload of File with Dangerous Type

This CVE was published Jun 07, 2023 and is one of 6 known issues for this plugin.

What to do

Update, patch or deactivate.

Update Page Builder: KingComposer to a release outside the affected range, or disable and remove it until a fixed version is available.

No confirmed safe version is listed. Consider a vendor-supported patch or temporarily restricting the affected functionality while you assess the risk.

Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.

Source record

Technical description

The Page Builder: KingComposer plugin for WordPress is vulnerable to Arbitrary File Uploads in versions up to, and including, 2.9.3 via the 'process_bulk_action' function in the 'kingcomposer/includes/kc.extensions.php' file. This makes it possible for authenticated users with author level permissions and above to upload arbitrary files onto the server which can be used to execute code on the server.

CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

NVD vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

Update, patch or deactivate.

Technical description

Primary and upstream sources