CVE-2025-47529 is a medium severity vulnerability classified under CWE-862 (Missing Authorization) affecting the UX Design Experts' Experto CTA Widget – a plugin that provides call-to-action features such as sticky CTAs and floating buttons. The vulnerability arises from improperly configured access control mechanisms within the plugin, allowing unauthorized users to perform actions or access functionalities that should be restricted. Specifically, the plugin fails to enforce proper authorization checks, which means that an attacker can exploit this flaw remotely (AV:N - network attack vector) without any privileges (PR:N) or user interaction (UI:N). The vulnerability impacts the integrity and availability of the affected systems, as unauthorized changes or disruptions to the plugin’s behavior can be made. The CVSS v3.1 score of 6.5 reflects a medium severity level, with the vector indicating that the attack can be conducted remotely with low complexity and no authentication required, potentially leading to partial loss of integrity and availability. No known exploits are reported in the wild as of the publication date (May 23, 2025), and no patches have been linked yet. The affected versions are not explicitly enumerated beyond 'n/a through 1.1.1', suggesting that all versions up to 1.1.1 are vulnerable. Given the plugin’s role in user interface elements that drive user engagement and conversions, exploitation could lead to unauthorized modification or disruption of call-to-action elements, potentially impacting website functionality and user experience.

For European organizations, the impact of this vulnerability can be significant, especially for businesses relying on the Experto CTA Widget to drive customer engagement and conversions on their websites. Unauthorized manipulation of call-to-action elements could lead to degraded user experience, loss of customer trust, and potential revenue loss. In sectors such as e-commerce, digital marketing, and online services, where CTAs are critical for business operations, this vulnerability could be exploited to disrupt service availability or integrity, possibly redirecting users or disabling important interactive elements. Additionally, unauthorized changes might be used as a vector for further attacks, such as injecting malicious content or misleading users, which could have compliance implications under GDPR if personal data or user trust is compromised. Although no known exploits exist currently, the ease of exploitation (no authentication or user interaction required) means that attackers could quickly develop exploits once the vulnerability becomes widely known, increasing the risk for European organizations using this plugin.

Given the absence of an official patch at the time of publication, European organizations should take immediate steps to mitigate risk. First, they should audit their websites to identify if the Experto CTA Widget – Call To Action, Sticky CTA, Floating Button Plugin is in use, particularly versions up to 1.1.1. If found, organizations should consider temporarily disabling the plugin or removing it until a secure version is released. Implementing web application firewalls (WAFs) with custom rules to detect and block suspicious requests targeting the plugin’s endpoints can reduce exposure. Monitoring web server logs for unusual access patterns or unauthorized attempts to manipulate CTA elements is also recommended. Organizations should engage with the vendor (UX Design Experts) for updates and patches and subscribe to vulnerability advisories. Additionally, restricting administrative access to the plugin’s configuration interfaces through network segmentation or IP whitelisting can limit exploitation opportunities. Finally, organizations should review their incident response plans to prepare for potential exploitation scenarios involving UI manipulation or availability disruption.