CVE-2025-13079 json
Popup Builder - Create highly converting, mobile friendly marketing popups. <= 4.4.2 - Improper Authorization to Unauthenticated Subscriber Removal via Predictable Tokens
published 2026-02-19 8 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-207887
- cvss
- 5.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 37%
- public exploits
- 0
- none known
Summary
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
Patch / fix
- sygnoos popup_builder 4.4.3
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 8 mo ago
Exploit prediction
0.43% chance of exploitation in the next 30 days, higher than 37% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
Affected products
- popupbuilder Popup Builder – Create highly converting, mobile friendly marketing popups.
Classification
- Weakness
-
- CWE-1241 Use of Predictable Algorithm in Random Number Generator
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/62b29721-0580-4e1d-824d-9b8355890248?source=cve
- plugins.trac.wordpress.org /browser/popup-builder/tags/4.4.2/com/classes/Actions.php#L842
- plugins.trac.wordpress.org /browser/popup-builder/tags/4.4.2/com/helpers/AdminHelper.php#L896
- plugins.trac.wordpress.org /changeset?sfp_email=&sfph_mail=&reponame=&old=3444540%40popup-builder&new=3444540%40popup-builder&sfp_email=&
Sources
- CVE List CVE-2025-13079
- NVD CVE-2025-13079
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.