CVE-2025-13079
Authorization Bypass in Popup Builder Plugin Enables Subscriber Unsubscription
Publication date: 2026-02-19
Last updated on: 2026-02-19
Assigner: Wordfence
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| popup_builder | popup_builder | to 4.4.2 (inc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-1241 | The device uses an algorithm that is predictable and generates a pseudo-random number. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
The vulnerability exists in the Popup Builder plugin for WordPress, versions up to and including 4.4.2. It is an authorization bypass issue caused by the plugin generating predictable unsubscribe tokens using deterministic data.
Because the unsubscribe tokens are predictable, an unauthenticated attacker who knows a victim's email address can brute-force these tokens to unsubscribe arbitrary subscribers from mailing lists.
How can this vulnerability impact me? :
This vulnerability allows attackers to unsubscribe users from mailing lists without their consent.
While it does not allow data theft or direct system compromise, it can disrupt communication by removing subscribers from marketing or notification lists.
This could lead to loss of engagement with users or customers and potentially impact marketing efforts.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
I don't know