Passeum Ticketing Plugin up to 1.0 on WordPress Setting get_shop_url shop_name cross site scripting

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Passeum Ticketing Plugin up to 1.0 on WordPress. The impacted element is the function get_shop_url of the component Setting Handler. This manipulation of the argument shop_name causes cross site scripting. The identification of this vulnerability is CVE-2026-7421. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in Passeum Ticketing Plugin up to 1.0 on WordPress. It has been declared as problematic. Affected by this vulnerability is the function get_shop_url of the component Setting Handler. The manipulation of the argument shop_name with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect integrity. The summary by CVE is:

The Passeum Ticketing plugin for WordPress is vulnerable to Stored Cross-Site Scripting in all versions up to, and including, 1.0. This is due to the `get_shop_url()` method returning the `shop_name` setting value without sanitization when it begins with "http", combined with insufficient validation in the `validate_shop_name()` function which only checks for empty values and string type. This makes it possible for authenticated attackers, with Administrator-level access and above, to inject arbitrary external scripts by setting the `shop_name` to an attacker-controlled URL (e.g., `https://attacker.com`), which causes the plugin to enqueue external JavaScript and CSS from the attacker-controlled domain via `wp_register_script()` and `wp_register_style()`. The injected scripts execute on every frontend page containing any Passeum Ticketing shortcode, affecting all site visitors. Please note that this does not affect single-site installations as administrators already have the `unfiltered_html` capability.

The weakness was shared by Kevin Lee. The advisory is shared at wordfence.com. This vulnerability is known as CVE-2026-7421 since 04/29/2026. The exploitation appears to be easy. The attack can be launched remotely. Additional levels of successful authentication are needed for exploitation. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

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 databases at CNNVD (CNNVD-202606-750) and EUVD (EUVD-2026-34054). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• WordPress Plugin

Vendor

• Passeum

Name

• Ticketing Plugin

Version

• 1.0

CPE 2.3info

• 🔒

CPE 2.2info

• 🔒

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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