The vulnerability identified as CVE-2025-11815 affects the UiPress lite plugin for WordPress, which is used to create custom dashboards, admin themes, and pages. The root cause is an improper authorization (CWE-285) due to a missing capability check in the uip_save_site_option() function. This function is responsible for saving site options related to the plugin. Because the plugin fails to verify whether the authenticated user has sufficient privileges before allowing changes, any user with Subscriber-level access or above can exploit this flaw to modify arbitrary plugin settings. Other AJAX actions within the plugin are also affected, potentially broadening the attack surface. The vulnerability is remotely exploitable over the network without requiring user interaction, making it easier for attackers to leverage once they have low-level authenticated access. The CVSS v3.1 base score is 4.3 (medium), reflecting the limited impact on confidentiality and availability but a clear integrity risk. No patches or fixes are currently linked, and no known exploits have been observed in the wild. This vulnerability could be leveraged to alter plugin behavior, potentially enabling further attacks or persistence mechanisms within WordPress environments.

For European organizations, this vulnerability poses a risk primarily to the integrity of WordPress site configurations that use the UiPress lite plugin. Unauthorized modification of plugin settings could lead to altered dashboard displays, misleading administrative information, or enablement of further malicious actions such as privilege escalation or backdoor installation if combined with other vulnerabilities. Although the vulnerability does not directly expose sensitive data or cause service outages, the ability for low-privileged users to change administrative plugin settings undermines trust in site management and could facilitate more damaging attacks. Organizations relying on WordPress for internal or customer-facing portals, especially those with multiple user roles including Subscribers, are at risk. This is particularly relevant for sectors with strict regulatory requirements for data integrity and auditability, such as finance, healthcare, and government institutions in Europe.

Immediate mitigation steps include restricting Subscriber-level user registrations and access on WordPress sites using UiPress lite until a patch is available. Administrators should audit user roles and permissions to ensure minimal necessary privileges are assigned. Employing Web Application Firewalls (WAFs) with custom rules to detect and block suspicious AJAX requests targeting the uip_save_site_option() function can reduce exploitation risk. Monitoring logs for unusual changes to plugin settings or unexpected AJAX activity is recommended. Organizations should follow the plugin vendor’s updates closely and apply patches promptly once released. Additionally, consider isolating WordPress administrative interfaces behind VPNs or IP allowlists to limit access to trusted users only. Regular backups of WordPress configurations and plugin settings will facilitate recovery if unauthorized changes occur.