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WordPress plugin

Page Builder: KingComposer < 2.9.4 — Stored Cross-Site Scripting

CVE-2020-36709Published · Updated

Action summary

Affected: <2.9.4Update to 2.9.4 or newer

All remediation steps
Watch plugin
Severity
Medium5.5
CVSS
5.5
CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N
What does this vector mean?
AV:N Attack vector
Network
AC:L Attack complexity
Low
PR:H Privileges required
High
UI:N User interaction
None
S:C Scope
Changed
C:L Confidentiality
Low
I:L Integrity
Low
A:N Availability
None
Weakness
CWE-79 Cross-Site Scripting
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< 2.9.4
  2. Patched in2.9.4

Update to 2.9.4 or newer.

You are affected if you run < 2.9.4. 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 Stored Cross-Site Scripting via via shortcode in versions before 2.9.4 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

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
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
High8.8Arbitrary File Upload
≤2.9.3Update to 2.9.4
CVE-2020-36701

Same weakness (Cross-Site Scripting)

All Cross-Site Scripting
Other Cross-Site Scripting 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 medium, CVSS 5.5

  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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