Persistent Cross-Site Scripting in WordPress Popup Builder by Popup Builder
CVE-2019-25744

5.1MEDIUM

Key Information:

Vendor

WordPress
Status
Popup Builder
Vendor
CVE Published:
4 June 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2019-25744?

The WordPress Popup Builder plugin version 3.49 is affected by a persistent cross-site scripting vulnerability. Attackers who authenticate can exploit this flaw by providing specially crafted POST requests to the post.php endpoint. By melding malicious scripts into the post_title parameter, they can inject harmful payloads that execute when popup selections are displayed, potentially compromising site integrity and user data.

Affected Version(s)

Popup Builder 3.49

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2019-25744 - Proof of Concept

References

https://www.exploit-db.com/exploits/47518
exploit
https://popup-builder.com/
product
https://wordpress.org/plugins/popup-builder/
product

CVSS V4

Score:
5.1
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Unk9vvN
.