WPBakery Page Builder for WordPress <= 6.4 — Authenticated (Contributor+) Stored Cross-Site Scripting
CVE-2020-28650Published · Updated Action summary
Affected: ≤6.4Update to 6.4.1 or newer
All remediation steps- Severity
- Medium6.4
- CVSS
- 6.4CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:NWhat does this vector mean?
AV:NAttack vector- Network
AC:LAttack complexity- Low
PR:LPrivileges required- Low
UI:NUser interaction- None
S:CScope- Changed
C:LConfidentiality- Low
I:LIntegrity- Low
A:NAvailability- 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?
WPBakery Page Builder js_composer
- Affected≤ 6.4
- Patched in6.4.1
Update to 6.4.1 or newer.
You are affected if you run ≤ 6.4. Version 6.4.1 and later are not affected by this issue.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under WPBakery Page Builder.
- No admin access? Run a passive check of your site. It reads public files only.
What to do
- Update to version 6.4.1, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch WPBakery Page Builder to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to Chloe Chamberland.
The WPBakery plugin for WordPress, in versions 6.4 and below, was designed with a flaw that could give users with contributor and author level roles the ability to inject malicious JavaScript into pages and posts. This flaw also gave these users the ability to edit other users’ posts. The plugin explicitly disabled any default post HTML filtering checks in the saveAjaxFe function using kses_remove_filters();. This meant that any user with access to the WPBakery builder could inject HTML and JavaScript anywhere in a post using the page builder.
Exploits & references
Proof-of-concept & detection
No public proof-of-concept or detection template is known for this vulnerability.
Advisories & patches
- Advisorywordfence.com
Related CVEs
More in WPBakery Page Builder
All 19| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| Medium6.4 | Authenticated (Subscriber+) Stored Cross-Site Scripting via Post Author Display Name ≤9.0.1Update to 9.1 | CVE-2026-119165 | |
| Medium6.4 | Authenticated (Subscriber+) Stored Cross-Site Scripting via 'data' Parameter ≤8.7.4Update to 9.0 | CVE-2026-15101 | |
| Medium4.3 | Missing Authorization ≤8.7.2Update to 8.7.3 | CVE-2026-45436 | |
| Medium6.4 | Authenticated (Contributor+) Stored Cross-Site Scripting ≤8.6Update to 8.7 | CVE-2025-10006 | |
| Medium6.4 | Stored Cross-Site Scripting via vc_custom_heading Shortcode ≤8.6.1Update to 8.7 | CVE-2025-11161 |
- Medium6.4Authenticated (Subscriber+) Stored Cross-Site Scripting via Post Author Display Name
≤9.0.1Update to 9.1
- Medium6.4Authenticated (Subscriber+) Stored Cross-Site Scripting via 'data' Parameter
≤8.7.4Update to 9.0
- Medium4.3Missing Authorization
≤8.7.2Update to 8.7.3
- Medium6.4Authenticated (Contributor+) Stored Cross-Site Scripting
≤8.6Update to 8.7
- Medium6.4Stored Cross-Site Scripting via vc_custom_heading Shortcode
≤8.6.1Update to 8.7
Same weakness (Cross-Site Scripting)
All Cross-Site Scripting| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| High7.2 | Unauthenticated Stored Cross-Site Scripting via Comment User-Agent Header | CVE-2026-120688 | |
| Critical9.8 | Unauthenticated Arbitrary File Upload via File Upload via Public Form Submission | CVE-2026-125055 | |
| Critical9.8 | Unauthenticated PHP Object Injection to Remote Code Execution via 'form' Parameter | CVE-2026-119077 | |
| Medium5.3 | Unauthenticated Sensitive Information Exposure in 'search' Parameter | CVE-2026-121518 |
- 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
- 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
- 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
- Medium5.3Unauthenticated Sensitive Information Exposure in 'search' Parameter
Customer Reviews for WooCommerce
≤5.127.0Update to 5.128.0
Timeline
CVE published
Severity medium, CVSS 6.4
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.