CVE-2025-13079: CWE-1241 Use of Predictable Algorithm in Random Number Generator in popupbuilder Popup Builder – Create highly converting, mobile friendly marketing popups.
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
AI Analysis
Technical Summary
CVE-2025-13079 affects the Popup Builder WordPress plugin, which generates unsubscribe tokens using a predictable algorithm based on deterministic data. This design flaw enables attackers without authentication to brute-force unsubscribe tokens if they know the victim's email address, thereby bypassing authorization controls and unsubscribing arbitrary mailing list subscribers. The vulnerability impacts all versions up to and including 4.4.2. The CVSS 3.1 base score is 5.3, reflecting a network attack vector with low complexity and no privileges required, causing integrity loss but no confidentiality or availability impact.
Potential Impact
An attacker can unsubscribe arbitrary subscribers from mailing lists without authentication by brute-forcing predictable unsubscribe tokens, leading to unauthorized modification of subscription status (integrity impact). There is no confidentiality or availability impact reported. This could disrupt marketing communications by removing subscribers without their consent.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should monitor vendor communications for updates. No specific temporary mitigations are provided in the available data.
CVE-2025-13079: CWE-1241 Use of Predictable Algorithm in Random Number Generator in popupbuilder Popup Builder – Create highly converting, mobile friendly marketing popups.
Description
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
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2025-13079 affects the Popup Builder WordPress plugin, which generates unsubscribe tokens using a predictable algorithm based on deterministic data. This design flaw enables attackers without authentication to brute-force unsubscribe tokens if they know the victim's email address, thereby bypassing authorization controls and unsubscribing arbitrary mailing list subscribers. The vulnerability impacts all versions up to and including 4.4.2. The CVSS 3.1 base score is 5.3, reflecting a network attack vector with low complexity and no privileges required, causing integrity loss but no confidentiality or availability impact.
Potential Impact
An attacker can unsubscribe arbitrary subscribers from mailing lists without authentication by brute-forcing predictable unsubscribe tokens, leading to unauthorized modification of subscription status (integrity impact). There is no confidentiality or availability impact reported. This could disrupt marketing communications by removing subscribers without their consent.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should monitor vendor communications for updates. No specific temporary mitigations are provided in the available data.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Wordfence
- Date Reserved
- 2025-11-12T16:38:13.590Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 69968d656aea4a407a39013e
Added to database: 2/19/2026, 4:11:17 AM
Last enriched: 4/9/2026, 4:25:33 PM
Last updated: 5/24/2026, 10:52:06 AM
Views: 93
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