CVE-2026-16090 GamiPress <= 7.9.9.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via gamipress_achievement Shortcode
Authenticated contributors can inject arbitrary scripts via shortcode attributes, 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-2026-16090?
CVE-2026-16090 is a medium-severity cross-site scripting vulnerability in rubengc GamiPress – Gamification plugin to reward points, achievements, badges & ranks in WordPress, published on 1 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-79
Which versions are affected by CVE-2026-16090?
How do I fix CVE-2026-16090?
No fix has been published for CVE-2026-16090 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-2026-16090 being exploited?
There is no known exploitation of CVE-2026-16090 in the wild and no public exploit code.
Sources
Also known as GHSA-vqxc-cxjv-jp2h.