rubengc GamiPress Plugin up to 7.9.9.1 on WordPress Shortcode heading_size cross site scripting

Summaryinfo

A vulnerability was found in rubengc GamiPress Plugin up to 7.9.9.1. It has been declared as problematic. The impacted element is an unknown function of the component Shortcode Handler. Executing a manipulation of the argument heading_size can lead to cross site scripting. This vulnerability is handled as CVE-2026-16090. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in rubengc GamiPress Plugin up to 7.9.9.1. It has been declared as problematic. This vulnerability affects some unknown processing of the component Shortcode Handler. The manipulation of the argument heading_size 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. CVE summarizes:

The GamiPress – Gamification plugin to reward points, achievements, badges & ranks in WordPress plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'heading_size' Shortcode Attribute in 'gamipress_achievement' in all versions up to, and including, 7.9.9.1 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. WordPress save-time wp_kses_post does not neutralize this payload because the injected value is stored inside a shortcode attribute rather than as a raw HTML tag, and is only emitted into HTML at render time without escaping.

The advisory is shared for download at wordfence.com. This vulnerability was named CVE-2026-16090 since 07/17/2026. The exploitation appears to be easy. The attack can be initiated 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.

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Productinfo

Type

• WordPress Plugin

Vendor

• rubengc

Name

• GamiPress Plugin

Version

• 7.9.9.0
• 7.9.9.1

CPE 2.3info

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CPE 2.2info

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