CVE-2026-16090
Received Received - Intake

Stored XSS in GamiPress WordPress Plugin

Publication date: 2026-08-01

Last updated on: 2026-08-01

Assigner: Wordfence

Description
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.

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Meta Information

Published
2026-08-01
Last Modified
2026-08-01
Generated
2026-08-01
AI Q&A
2026-08-01
EPSS Evaluated
N/A
NVD
CVE-2026-16090
EUVD
EUVD-2026-51750

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
gamipress gamipress to 7.9.9.1 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
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.

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Executive Summary

This vulnerability is a Stored Cross-Site Scripting (XSS) flaw in the GamiPress WordPress plugin. It allows authenticated attackers with contributor-level access or higher to inject malicious scripts via the 'heading_size' shortcode attribute in the 'gamipress_achievement' shortcode. The issue occurs due to insufficient input sanitization and output escaping, enabling script execution when users view infected pages.

Detection Guidance

This vulnerability can be detected by checking for the presence of the GamiPress plugin versions up to 7.9.9.1. Inspect WordPress sites for the 'gamipress_achievement' shortcode with unsanitized 'heading_size' attributes. Review pages for unexpected scripts in rendered content.

Impact Analysis

If exploited, this vulnerability could allow attackers to steal user sessions, perform actions on behalf of users, or deface websites. Users visiting compromised pages may have their data exposed or be redirected to malicious sites. The impact depends on the attacker's goals and the site's user base.

Compliance Impact

This vulnerability could lead to non-compliance with GDPR or HIPAA by exposing user data through XSS attacks. GDPR requires protecting personal data, while HIPAA mandates safeguarding health information. A successful exploit may result in data breaches, triggering regulatory penalties and legal consequences.

Mitigation Strategies

Immediately update the GamiPress plugin to the latest version beyond 7.9.9.1. Remove or restrict contributor-level access to untrusted users. Review pages for injected scripts and sanitize any suspicious content.

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