CVE-2026-2292 in Morkva UA Shipping Plugin
Summary
by MITRE • 03/04/2026
The Morkva UA Shipping plugin for WordPress is vulnerable to Stored Cross-Site Scripting via admin settings in all versions up to, and including, 1.7.9 due to insufficient input sanitization and output escaping. 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 an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.
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Analysis
by VulDB Data Team • 03/06/2026
The CVE-2026-2292 vulnerability represents a critical stored cross-site scripting flaw within the Morkva UA Shipping plugin for WordPress, affecting versions through 1.7.9. This vulnerability arises from inadequate input sanitization and output escaping mechanisms within the plugin's administrative settings interface. The flaw specifically targets multi-site WordPress installations where the unfiltered_html capability has been disabled, creating a dangerous attack vector for privileged users. The vulnerability's impact is particularly severe because it requires only administrator-level permissions or higher to exploit, making it accessible to attackers who have already gained administrative access to a WordPress installation. The stored nature of this XSS vulnerability means that malicious scripts injected through the admin settings will persist and execute whenever any user accesses the affected pages, creating a persistent threat that can affect multiple users over time.
The technical exploitation of this vulnerability occurs through the plugin's administrative configuration interface where user input is not properly sanitized before being stored in the database. When administrators modify settings within the Morkva UA Shipping plugin, the input validation mechanisms fail to adequately filter malicious content, allowing attackers to inject JavaScript code or other malicious scripts. These scripts are then stored in the WordPress database and executed whenever the affected pages are rendered to users, creating a classic stored XSS scenario. The vulnerability's scope is limited to multi-site installations where unfiltered_html has been disabled, which suggests that the plugin's developers may have assumed that such environments would have additional security measures in place. However, this assumption proved faulty, leaving administrators vulnerable to attacks that could compromise the entire network of sites within a multi-site installation.
The operational impact of CVE-2026-2292 extends beyond simple script execution, as it can enable attackers to perform various malicious activities including session hijacking, data exfiltration, and privilege escalation within the compromised WordPress environment. Once an attacker successfully injects malicious scripts through the plugin's settings, they can potentially steal administrator credentials, modify content, or redirect users to malicious websites. The vulnerability's requirement for administrator-level access means that it can be leveraged as a persistent backdoor within compromised installations, allowing attackers to maintain long-term access and control over WordPress sites. This makes the vulnerability particularly dangerous in enterprise environments where administrators may have elevated privileges and access to sensitive data, potentially leading to significant data breaches or system compromise.
Organizations affected by CVE-2026-2292 should implement immediate mitigation strategies including updating to the latest version of the Morkva UA Shipping plugin where the vulnerability has been patched, or applying custom code patches to address the input sanitization and output escaping deficiencies. The vulnerability aligns with CWE-79, which describes Cross-Site Scripting vulnerabilities, and can be categorized under ATT&CK technique T1566.001 for credential access through social engineering. Security teams should also consider implementing additional monitoring for unusual administrative activity within WordPress installations and ensure that proper input validation is enforced across all plugin and theme components. The vulnerability highlights the importance of proper security testing and input validation in WordPress plugins, particularly those that modify administrative settings where privileged users can inject content. Organizations should also review their WordPress security configurations and ensure that proper access controls and monitoring are in place to detect potential exploitation attempts.