CVE-2026-8883
MediumCVSS 6.4Exploitation Probability (EPSS)
Low risk9th percentile - higher than 9% of all known CVEs
Summary
The Global Body Mass Index Calculator plugin for WordPress up to version 1.2 is vulnerable to Stored XSS via the 'gbmicalc' shortcode. The GBMI_Calc_Widget::widget() function uses @extract($args) and echoes shortcode attributes unescaped into HTML style and body contexts.
Risk Assessment
An authenticated attacker with contributor-level access or higher can inject arbitrary scripts that execute when users visit injected pages, enabling data theft or session hijacking.
Recommendation
Update the Global Body Mass Index Calculator plugin to the latest version. If unavailable, remove the shortcode from content or temporarily disable the plugin.
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Original NVD description (English source)
The Global Body Mass Index Calculator plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'gbmicalc' shortcode in versions up to, and including, 1.2. This is due to insufficient input sanitization and output escaping on user-supplied shortcode attributes in the GBMI_Calc_Widget::widget() function. Shortcode attributes are extracted directly into local variables via @extract($args) and then echoed unescaped into an HTML style attribute (height/width) and HTML body context (title), allowing attribute-breakout payloads. 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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

