Popup Builder - Create highly converting, mobile friendly marketing popups. <= 4.4.2 - Improper Authorization to Unauthenticated Subscriber Removal via Predictable Tokens

2026-02-18 00:00

Rafshanzani Suhada

Strategic Overview

Status

Patched in 4.4.3

Affected PluginPopup Builder – Create highly converting, mobile friendly marketing popups.

Affected Version<= 4.4.2

CVSS5.3Medium

CVECVE-2025-13079

View all Popup Builder – Create highly converting, mobile friendly marketing popups. vulnerabilities

Vulnerability Overview

The Popup Builder – Create highly converting, mobile friendly marketing popups. plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 4.4.2. This is due to the plugin generating predictable unsubscribe tokens using deterministic data. This makes it possible for unauthenticated attackers to unsubscribe arbitrary subscribers from mailing lists via brute-forcing the unsubscribe token, granted they know the victim's email address

Technical Analysis

REMEDIATION: Update to version 4.4.3, or a newer patched version --- IDENTIFIER: CWE-1241 (Use of Predictable Algorithm in Random Number Generator) The device uses an algorithm that is predictable and generates a pseudo-random number.

External References

https://www.cve.org/CVERecord?id=CVE-2025-13079 https://www.wordfence.com/threat-intel/vulnerabilities/id/62b29721-0580-4e1d-824d-9b8355890248

CVSS Vector

5.3

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityNone
IntegrityLow
AvailabilityNone

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