CVE-2026-126119 - Critical Vulnerability in Streamit WordPress Plugin

Introduction

The security of WordPress plugins and themes is essential for protecting the stores and websites that use this platform. Recently, a critical vulnerability was identified in the Streamit plugin, which may allow remote code execution by unauthenticated attackers.

What happened?

The Streamit plugin, before version 1.3.10, does not perform authorization or nonce verification on one of its unauthenticated AJAX routes. This allows an attacker to invoke arbitrary PHP functions using attacker-supplied arguments. As a result, this can lead to privilege escalation and remote code execution.

How the vulnerability works

The vulnerability lies in the lack of authorization checks on an AJAX route. Without these checks, an attacker can call PHP functions that should not be accessible, potentially creating administrator accounts or executing other malicious actions.

What is the real impact?

The impact of this vulnerability is significant, as it allows unauthenticated attackers to perform actions that normally require elevated privileges. This can result in the complete compromise of the site, allowing an attacker to control the system, access sensitive data, or cause irreparable damage.

Which versions are affected?

• Streamit WordPress plugin before version 1.3.10

How to fix

1. Update the Streamit plugin to version 1.3.10 or higher.
2. Ensure that all other WordPress extensions and themes are updated.
3. Consider conducting a security audit on your site to identify other potential vulnerabilities.

Mitigation while you update

While it is not possible to update, it is recommended to disable the Streamit plugin to prevent any exploitation of the vulnerability. Additionally, implement further security measures such as firewalls and monitoring for suspicious activities.

Conclusion

The CVE-2026-126119 vulnerability in the Streamit WordPress plugin poses a significant risk to website security. It is crucial for users to update to the patched version as soon as possible to protect their systems.