CVE-2026-15797 json
Popup Maker <= 1.24.0 - Authenticated (Contributor+) Stored Cross-Site Scripting via post_title
published 2026-09-18 52 d ago modified 2026-09-19 50 d ago also EUVD-2026-82854
- cvss
- 6.4
- 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 39%
- public exploits
- 0
- none known
Summary
The Popup Maker – Boost Sales, Conversions, Optins, Subscribers with the Ultimate WP Popup Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via post_title in all versions up to, and including, 1.24.0 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This requires the attacker to create a post with an HTML entity-encoded payload in the title, which bypasses sanitize_text_field on save and is later decoded and executed by the browser when rendered by the Select2 component.
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 51 d ago
Exploit prediction
0.45% chance of exploitation in the next 30 days, higher than 39% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N |
Affected products
- danieliser Popup Maker – Boost Sales, Conversions, Optins, Subscribers with the Ultimate WP Popup Builder
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/973b23c6-4edd-4f89-b5cf-68e83cfdb8ac?source=cve
- plugins.trac.wordpress.org /browser/popup-maker/tags/1.23.0/classes/Admin/Ajax.php#L163
- plugins.trac.wordpress.org /browser/popup-maker/tags/1.23.0/dist/assets/admin-general.js#L1
- plugins.trac.wordpress.org /browser/popup-maker/tags/1.23.0/classes/Admin/Ajax.php#L152
- plugins.trac.wordpress.org /browser/popup-maker/tags/1.23.0/classes/Helpers.php#L192
- plugins.trac.wordpress.org /browser/popup-maker/tags/1.22.0/classes/Admin/Ajax.php#L163
- plugins.trac.wordpress.org /browser/popup-maker/tags/1.22.0/dist/assets/admin-general.js#L1
- plugins.trac.wordpress.org /browser/popup-maker/tags/1.22.0/classes/Admin/Ajax.php#L152
- plugins.trac.wordpress.org /browser/popup-maker/tags/1.22.0/classes/Helpers.php#L192
- plugins.trac.wordpress.org /changeset?reponame=&new=3690634%40popup-maker%2Ftags%2F1.25.0&old=3648112%40popup-maker%2Ftags%2F1.24.0
- plugins.trac.wordpress.org /changeset/3690634/popup-maker/trunk/classes/Admin/Ajax.php
Sources
- CVE List CVE-2026-15797
- NVD CVE-2026-15797
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.