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WordPress plugin

Popup Box Business (7.0.0 — 7.9.0) and Developer (20.0.0 - 20.9.0) - Authenticated (Admin+) Stored Cross-Site Scripting

CVE-2023-6591Published · Updated

Action summary

Affected: 20.0.0 – <20.9.0Update to 20.9.0 or newer

All remediation steps
Watch plugin
Severity
Medium6.6
CVSS
6.6
CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:H/A:N
What does this vector mean?
AV:N Attack vector
Network
AC:H Attack complexity
High
PR:H Privileges required
High
UI:N User interaction
None
S:C Scope
Changed
C:L Confidentiality
Low
I:H Integrity
High
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?

Popup Box – Create Countdown, Coupon, Video, Contact Form Popups ays-popup-box

  1. Affected20.0.0 – < 20.9.0
  2. Patched in20.9.0

Update to 20.9.0 or newer.

You are affected if you run 20.0.0 – < 20.9.0. Version 20.9.0 and later are not affected by this issue.

  • Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Popup Box – Create Countdown, Coupon, Video, Contact Form Popups.
  • No admin access? Run a passive check of your site. It reads public files only.

What to do

  1. Update to version 20.9.0, or a newer patched version
  2. Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
  3. Watch Popup Box – Create Countdown, Coupon, Video, Contact Form Popups to get an email when the next vulnerability is published.

Advisory

Source description from Wordfence Intelligence, credited to John Jefferson Li.

The Popup Box Business and Developer plugin for WordPress is vulnerable to Stored Cross-Site Scripting via admin settings in versions 20.0.0 to 20.9.0 (Developer) and versions 7.0.0 to 7.9.0 (Business) due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled. Please note this affects the premium version of the plugin despite the shared slug.

Exploits & references

Proof-of-concept & detection

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

Advisories & patches

More in Popup Box – Create Countdown, Coupon, Video, Contact Form Popups

All 21
More vulnerabilities in Popup Box – Create Countdown, Coupon, Video, Contact Form Popups
SeverityVulnerabilityCVEPublished
Medium4.86.4.2 - Unauthenticated Arbitrary Shortcode Execution via Client-IP / X-Forwarded-For HTTP Headers
6.4.1 – 6.4.2Update to 6.4.3
CVE-2026-100159
Medium4.9Authenticated (Administrator+) SQL Injection
≤6.0.1Update to 6.0.2
CVE-2026-57631
Medium6.1Reflected Cross-Site Scripting
≤6.2.9Update to 6.3.0
CVE-2026-54192
High7.2Unauthenticated Stored Cross-Site Scripting
<5.5.0Update to 5.5.0
CVE-2025-15611
Medium4.3Cross-Site Request Forgery to Popup Status Change
≤6.1.1Update to 6.1.2
CVE-2026-1165

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 6.6

  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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