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 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. The wp_kses_post filter applied at post save does not neutralize this payload because only the inert shortcode text is stored in post_content; the dangerous HTML is synthesized at render time by the shortcode handler, entirely bypassing save-time sanitization.
References7
- plugins.trac.wordpress.org/browser/gamipress/tags/7.9.8/include…
- plugins.trac.wordpress.org/browser/gamipress/tags/7.9.8/include…
- plugins.trac.wordpress.org/browser/gamipress/tags/7.9.8/include…
- plugins.trac.wordpress.org/browser/gamipress/tags/7.9.8/include…
- plugins.trac.wordpress.org/browser/gamipress/tags/7.9.8/include…
- plugins.trac.wordpress.org/changeset?reponame=&old=3619577%40ga…
- www.wordfence.com/threat-intel/vulnerabilities/id/dedd24e6-ac0c…
Metrics
- CVSS 3.1
-
6.4
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N - EPSS — exploit probability
- 0% percentile: 32 · as of 13 November 2026
- CWE
- CWE-79
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.