CVE-2026-0554 is a vulnerability identified in the NotificationX WordPress plugin, which provides FOMO, live sales notifications, WooCommerce sales popups, GDPR compliance features, social proof, announcement banners, and floating notification bars. The issue arises from missing authorization checks on the 'regenerate' and 'reset' REST API endpoints, allowing any authenticated user with Contributor-level permissions or higher to reset analytics data for any NotificationX campaign, regardless of campaign ownership. This vulnerability is classified under CWE-862 (Missing Authorization) and affects all versions up to and including 3.1.11. The vulnerability does not require user interaction and can be exploited remotely over the network. The CVSS v3.1 base score is 4.3, indicating medium severity, with the vector AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N, meaning it is remotely exploitable with low attack complexity, requires privileges (Contributor or higher), no user interaction, unchanged scope, no confidentiality or availability impact, but results in integrity impact by unauthorized modification of analytics data. While the vulnerability does not allow data disclosure or system compromise, it undermines the integrity of marketing analytics, potentially misleading decision-making or disrupting campaign effectiveness. No patches were linked at the time of publication, and no known exploits have been reported in the wild. The vulnerability was assigned by Wordfence and published on January 20, 2026.

For European organizations, the primary impact of CVE-2026-0554 lies in the unauthorized modification of marketing analytics data within the NotificationX plugin. This can lead to inaccurate sales or campaign performance metrics, potentially causing misguided business decisions or loss of trust in marketing data. Organizations heavily reliant on e-commerce and digital marketing campaigns using NotificationX may experience disruptions in campaign monitoring and reporting. Although the vulnerability does not expose sensitive data or cause service outages, it can degrade the integrity of business intelligence. Additionally, if exploited in conjunction with other vulnerabilities or insider threats, it could facilitate more extensive manipulation or fraud. The requirement for Contributor-level access limits the attack surface to users with some level of trust, but in environments with many contributors or weak access controls, the risk increases. European companies operating in competitive markets or regulated sectors where data accuracy is critical should consider this vulnerability significant enough to warrant prompt mitigation.

To mitigate CVE-2026-0554, European organizations should implement the following specific actions: 1) Restrict Contributor-level and higher permissions strictly to trusted users, minimizing the number of accounts that can exploit this vulnerability. 2) Monitor and audit REST API usage, focusing on calls to 'regenerate' and 'reset' endpoints of NotificationX to detect unauthorized or suspicious activity. 3) Employ Web Application Firewalls (WAFs) with custom rules to block or alert on unauthorized API requests targeting these endpoints. 4) Temporarily disable or restrict access to NotificationX analytics features if feasible until an official patch is released. 5) Engage with the plugin vendor (wpdevteam) to obtain or verify availability of patches or updates addressing this issue and apply them promptly once available. 6) Educate content contributors and administrators about the risk and ensure strong credential hygiene to prevent account compromise. 7) Review and tighten WordPress user role assignments and capabilities to enforce the principle of least privilege. These measures go beyond generic advice by focusing on access control, monitoring, and proactive vendor engagement tailored to this specific vulnerability.