# CVE-2026-15797: Popup Maker stored cross-site scripting in post title

Source: https://junglewise.ai/threats/cve-2026-15797-popup-maker-stored-cross-site-scripting-in-post-title  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-18. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-15797 · Severity: medium · CVSS 6.4 · Published 2026-09-18

Popup Maker is a WordPress plugin used to create pop-ups for sales conversion and lead generation. The plugin fails to properly sanitize post titles, allowing authenticated contributors to inject malicious scripts that execute in the browsers of all users viewing affected pages. An attacker could steal user data, redirect visitors, or deface content.

Technologies: [Popup Maker](https://junglewise.ai/threats/technologies/popup-maker). Vendors: [Popup Maker](https://junglewise.ai/threats/vendors/popup-maker).

## Quick answers

**Is CVE-2026-15797 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-15797 being exploited in the wild.

**How severe is CVE-2026-15797?** Medium severity, with a CVSS score of 6.4, published 18 September 2026.

**Which products and versions are affected?** Popup Maker up to and including 1.24.0.

**Is there a fix for CVE-2026-15797?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-15797 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-15797?** Check whether you run Popup Maker at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The vulnerability is a stored cross-site scripting (XSS) flaw in the post_title field of the Popup Maker WordPress plugin (versions up to 1.24.0). The root cause is insufficient input sanitization and output escaping; attackers can bypass sanitize_text_field by HTML entity-encoding payloads, which are then decoded and executed by the Select2 component when pages are rendered. The attack requires authenticated access with contributor-level privileges or above. An attacker can inject arbitrary JavaScript that persists in the database and executes whenever any user accesses an injected page. A patch should be available in versions after 1.24.0.

## Affected products

- Popup Maker Popup Maker up to and including 1.24.0

## Timeline

- 2026-09-18: disclosed

## References

- [https://plugins.trac.wordpress.org/browser/popup-maker/tags/1.22.0/classes/Admin/Ajax.php](https://plugins.trac.wordpress.org/browser/popup-maker/tags/1.22.0/classes/Admin/Ajax.php)
- [https://plugins.trac.wordpress.org/browser/popup-maker/tags/1.22.0/classes/Admin/Ajax.php](https://plugins.trac.wordpress.org/browser/popup-maker/tags/1.22.0/classes/Admin/Ajax.php)

## Related threats

- [Popup Maker WordPress plugin authorization bypass in account connection](https://junglewise.ai/threats/cve-2026-85004-the-popup-maker-wordpress-plugin-through-1-4-5-does-not-perform-a)
- [Popup Maker authorization bypass in REST API](https://junglewise.ai/threats/cve-2026-8848-popup-maker-authorization-bypass-in-rest-api)