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Popup Box – Best WordPress Popup Plugin <= 4.3.6 — Missing Authorization to Information Exposure

CVE-2024-3897Published · Updated

Action summary

Affected: ≤4.3.6Update to 4.3.7 or newer

All remediation steps
Watch plugin
Severity
Medium5.3
CVSS
5.3
CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
What does this vector mean?
AV:N Attack vector
Network
AC:L Attack complexity
Low
PR:N Privileges required
None
UI:N User interaction
None
S:U Scope
Unchanged
C:L Confidentiality
Low
I:N Integrity
None
A:N Availability
None
Weakness
CWE-862 Missing Authorization
Required access
No account needed
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. Affected≤ 4.3.6
  2. Patched in4.3.7

Update to 4.3.7 or newer.

You are affected if you run ≤ 4.3.6. Version 4.3.7 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.
  • No account is needed to exploit this. Treat any exposed site on an affected version as at risk.

What to do

  1. Update to version 4.3.7, 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 Krzysztof Zając.

The Popup Box – Best WordPress Popup Plugin plugin for WordPress is vulnerable to unauthorized access of data due to a missing capability check on the ays_pb_create_author AJAX action in all versions up to, and including, 4.3.6. This makes it possible for unauthenticated attackers to enumerate all emails registered on the website.

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 (Missing Authorization)

All Missing Authorization
Other Missing Authorization 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 5.3

  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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