# Rio EMI Calculator <= 1.4.1 - Authenticated (Administrator+) Stored Cross-Site Scripting via Currency Display Setting

- **ID:** WPSEC-2026-1422
- **Plugin:** EMI Calculator (`rio-emi-calculator`), https://wordpress.org/plugins/rio-emi-calculator/
- **Affected versions:** all versions before 1.4.2
- **Fixed in:** 1.4.2 (Update to 1.4.2 or later.)
- **Severity:** Medium 4.4 (CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N)
- **Weakness:** CWE-79
- **Usage among sites WPSec scans:** plugin Low, affected versions Low (as of 2026-10-22)
- **Attack surface analysis:** https://attacksurface.wpsec.com/plugin/rio-emi-calculator
- **Fix released:** 2026-10-21
- **Published:** 2026-10-22
- **URL:** https://wpsec.com/vuln/WPSEC-2026-1422/

## Description

The EMI Calculator plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'curr_display' value of the plugin's 'rio_settings' option in all versions up to, and including, 1.4.1, due to insufficient input sanitization when the setting is saved and missing output escaping when the value is rendered by the [rio-emi-calculator] shortcode. This makes it possible for authenticated attackers, with administrator-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses a page containing the calculator. This only affects multi-site installations and installations where unfiltered_html has been disabled.

## References

- https://wpsec.com/vuln/WPSEC-2026-1422/
- https://plugins.svn.wordpress.org/rio-emi-calculator/tags/1.4.2/
- https://wordpress.org/plugins/rio-emi-calculator/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-1422/

License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Free to use, share and adapt, also commercially, if you credit WPSec and link to this advisory.