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WordPress plugin

Page Builder: KingComposer < 2.9.4 — Arbitrary File Upload

CVE-2020-36701Published · Updated

Action summary

Affected: ≤2.9.3Update to 2.9.4 or newer

All remediation steps
Watch plugin
Severity
High8.8
CVSS
8.8
CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
What does this vector mean?
AV:N Attack vector
Network
AC:L Attack complexity
Low
PR:L Privileges required
Low
UI:N User interaction
None
S:U Scope
Unchanged
C:H Confidentiality
High
I:H Integrity
High
A:H Availability
High
Weakness
CWE-434 Arbitrary File Upload
Required access
Unknown
Exploit prediction (EPSS)
No score
CISA KEV
Not listed
On this page8

Am I affected?

Page Builder: KingComposer – Free Drag and Drop page builder by King-Theme kingcomposer

  1. Affected≤ 2.9.3
  2. Patched in2.9.4

Update to 2.9.4 or newer.

You are affected if you run ≤ 2.9.3. Version 2.9.4 and later are not affected by this issue.

  • Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Page Builder: KingComposer – Free Drag and Drop page builder by King-Theme.
  • No admin access? Run a passive check of your site. It reads public files only.

What to do

  1. Update to version 2.9.4, or a newer patched version
  2. Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
  3. Watch Page Builder: KingComposer – Free Drag and Drop page builder by King-Theme to get an email when the next vulnerability is published.

Advisory

Source description from Wordfence Intelligence, credited to Jerome Bruandet.

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.

Exploits & references

Proof-of-concept & detection

No public proof-of-concept or detection template is known for this vulnerability.

Advisories & patches

More in Page Builder: KingComposer – Free Drag and Drop page builder by King-Theme

All 8
More vulnerabilities in Page Builder: KingComposer – Free Drag and Drop page builder by King-Theme
SeverityVulnerabilityCVEPublished
High8.5Authenticated Arbitrary Profile Creation and Stored Cross-Site Scripting
≤2.9.6No patch available
CVE-2021-25048
High8.8Open Redirect
≤2.9.6No patch available
CVE-2022-0165
Medium5.5Stored Cross-Site Scripting
<2.9.4Update to 2.9.4
CVE-2020-36709
Medium6.1Reflected Cross-Site Scripting
≤2.9.4Update to 2.9.5
CVE-2020-15299
High8.8Authorization Bypass due to Improper Access Control
≤2.9.3Update to 2.9.4
CVE-2020-36700

Same weakness (Arbitrary File Upload)

All Arbitrary File Upload
Other Arbitrary File Upload vulnerabilities
SeverityVulnerabilityCVEPublished
High7.2Unauthenticated Stored Cross-Site Scripting via Comment User-Agent Header
EZ SQL Reports Shortcode Widget and DB Backup≤5.25.25Update to 5.26.45
CVE-2026-120688
Critical9.8Unauthenticated Arbitrary File Upload via File Upload via Public Form Submission
Chatterbug Forms – Fast, Flexible WordPress Form Builder≤1.0.2Update to 1.1
CVE-2026-125055
Critical9.8Unauthenticated PHP Object Injection to Remote Code Execution via 'form' Parameter
ELEX WordPress HelpDesk & Customer Ticketing System≤3.3.9Update to 3.4.0
CVE-2026-119077
Medium5.3Unauthenticated Sensitive Information Exposure in 'search' Parameter
Customer Reviews for WooCommerce≤5.127.0Update to 5.128.0
CVE-2026-121518

Timeline

  1. CVE published

    Severity high, CVSS 8.8

  2. Record last updated

Sources & licenses

Wordfence record
Vulnerability data
Wordfence Intelligence. Copyright 2012-2026 Defiant Inc. Licensed under the CC BY-SA 4.0.
CVE® identifiers
Copyright 1999-2026 The MITRE Corporation. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
CVSS / CWE
National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
VulnCrest content
Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.

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