# VikRentCar Car Rental Management System <= 1.4.10 - Authenticated (Contributor+) Stored Cross-Site Scripting via Widget Block Additional CSS Class

- **ID:** WPSEC-2026-1853
- **Plugin:** VikRentCar Car Rental Management System (`vikrentcar`), https://wordpress.org/plugins/vikrentcar/
- **Affected versions:** from 1.4.0 before 1.4.11
- **Fixed in:** 1.4.11 (Update to 1.4.11 or later.)
- **Severity:** Medium 6.4 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N)
- **Weakness:** CWE-79
- **Usage among sites WPSec scans:** plugin Low, affected versions None seen (as of 2026-10-28)
- **Attack surface analysis:** https://attacksurface.wpsec.com/plugin/vikrentcar
- **Fix released:** 2026-10-27
- **Published:** 2026-10-28
- **URL:** https://wpsec.com/vuln/WPSEC-2026-1853/

## Description

The VikRentCar Car Rental Management System plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'Additional CSS class' (className) attribute of the plugin's widget blocks (Cars List, Search, Currency Converter) in versions 1.4.0 up to, and including, 1.4.10. This is due to the block render callback using the className value as the widget class suffix and inserting it into the wrapper's class attribute with no sanitization or 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.

## References

- https://wpsec.com/vuln/WPSEC-2026-1853/
- https://plugins.svn.wordpress.org/vikrentcar/tags/1.4.11/
- https://wordpress.org/plugins/vikrentcar/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-1853/

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.