CVE-2026-15797 Popup Maker <= 1.24.0 - Authenticated (Contributor+) Stored Cross-Site Scripting via post_title
Authenticated contributors can inject arbitrary scripts via post titles, leading to stored XSS execution for other users.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-15797?
CVE-2026-15797 is a medium-severity cross-site scripting vulnerability in danieliser Popup Maker – Boost Sales, Conversions, Optins, Subscribers with the Ultimate WP Popup Builder, published on 18 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Weakness: CWE-79
Which versions are affected by CVE-2026-15797?
How do I fix CVE-2026-15797?
No fix has been published for CVE-2026-15797 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-15797 being exploited?
There is no known exploitation of CVE-2026-15797 in the wild and no public exploit code.
Sources
Also known as GHSA-m455-q9mx-cr49.