danieliser Popup Maker Plugin up to 1.24.0 on WordPress Select2 sanitize_text_field post_title cross site scripting

Summaryinfo

A vulnerability classified as problematic was found in danieliser Popup Maker Plugin up to 1.24.0. Impacted is the function sanitize_text_field of the component Select2. Such manipulation of the argument post_title leads to cross site scripting. This vulnerability is documented as CVE-2026-15797. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in danieliser Popup Maker Plugin up to 1.24.0. It has been rated as problematic. Affected by this issue is the function sanitize_text_field of the component Select2. The manipulation of the argument post_title with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Impacted is integrity. CVE summarizes:

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.

The advisory is shared for download at wordfence.com. This vulnerability is handled as CVE-2026-15797 since 07/14/2026. The exploitation is known to be easy. The attack may be launched remotely. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1059.007.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-82854). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

• WordPress Plugin

Vendor

• danieliser

Name

• Popup Maker Plugin

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.7
• 1.8
• 1.9
• 1.10
• 1.11
• 1.12
• 1.13
• 1.14
• 1.15
• 1.16
• 1.17
• 1.18
• 1.19
• 1.20
• 1.21
• 1.22
• 1.23
• 1.24.0

CPE 2.3info

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CPE 2.2info

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• 🔒

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Entryinfo

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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