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

Q: What is CVE-2026-16143?

CVE-2026-16143 is a high-severity cross-site scripting vulnerability in e4jvikwp VikRentItems Flexible Rental Management System, published on 5 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Q: Is CVE-2026-16143 being exploited?

There is no known exploitation of CVE-2026-16143 in the wild and no public exploit code.

Q: How do I fix CVE-2026-16143?

No fix has been published for CVE-2026-16143 yet. Limit exposure of the affected software until one is available.

High 7.2 Published 5 Aug 2026 Updated 5 Aug 2026

Unauthenticated attackers can inject arbitrary scripts via the customer email field in the VikRentItems WordPress plugin, leading to code execution when victims view the page.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-16143?

CVE-2026-16143 is a high-severity cross-site scripting vulnerability in e4jvikwp VikRentItems Flexible Rental Management System, published on 5 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official 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.

Weakness: CWE-79

Which versions are affected by CVE-2026-16143?

How do I fix CVE-2026-16143?

No fix has been published for CVE-2026-16143 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2026-16143 being exploited?