CVE-2025-30626 is a high-severity reflected Cross-site Scripting (XSS) vulnerability identified in the LambertGroup Multimedia Playlist Slider Addon for WPBakery Page Builder, affecting versions up to 2.1. The vulnerability arises from improper neutralization of user-supplied input during web page generation, classified under CWE-79. Specifically, the addon fails to adequately sanitize or encode input parameters that are reflected in the web page output, allowing an attacker to inject malicious scripts. When a victim user interacts with a crafted URL or input, the malicious script executes in their browser context, potentially leading to session hijacking, credential theft, or unauthorized actions performed with the victim’s privileges. The CVSS 3.1 base score of 7.1 reflects the vulnerability’s network attack vector (AV:N), low attack complexity (AC:L), no privileges required (PR:N), but requiring user interaction (UI:R). The scope is changed (S:C), indicating that exploitation can affect resources beyond the vulnerable component, with impacts on confidentiality, integrity, and availability rated as low to moderate (C:L/I:L/A:L). No known exploits are currently reported in the wild, and no patches have been published at the time of this analysis. The vulnerability specifically targets the Multimedia Playlist Slider Addon, a plugin component for WPBakery Page Builder, a widely used WordPress page builder plugin. Given the reflected nature of the XSS, exploitation requires tricking users into clicking malicious links or submitting crafted inputs, making social engineering a key component of attacks leveraging this flaw.

For European organizations, this vulnerability poses a significant risk especially for those relying on WordPress websites utilizing WPBakery Page Builder with the affected Multimedia Playlist Slider Addon. Successful exploitation can lead to session hijacking, enabling attackers to impersonate legitimate users, including administrators, thereby compromising website integrity and user data confidentiality. This can result in defacement, unauthorized content injection, or redirection to malicious sites, damaging brand reputation and customer trust. Additionally, attackers could leverage the XSS flaw as a pivot point for further attacks such as delivering malware or phishing campaigns targeting European users. Given the widespread use of WordPress in Europe across sectors like e-commerce, media, and government, the potential impact includes data breaches, service disruption, and regulatory non-compliance under GDPR if personal data is exposed or manipulated. The requirement for user interaction somewhat limits automated exploitation but does not eliminate risk, especially for high-profile or high-traffic sites where attackers can craft convincing social engineering lures.

European organizations should prioritize the following specific mitigation steps: 1) Immediately audit WordPress installations to identify the presence of the LambertGroup Multimedia Playlist Slider Addon and verify the version in use. 2) Disable or remove the vulnerable addon if it is not essential to site functionality. 3) Monitor vendor channels and security advisories closely for the release of official patches or updates addressing CVE-2025-30626 and apply them promptly. 4) Implement Web Application Firewall (WAF) rules tailored to detect and block reflected XSS attack patterns targeting the affected plugin’s parameters. 5) Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in browsers, mitigating the impact of potential XSS payloads. 6) Conduct user awareness training to reduce the likelihood of users clicking on suspicious links that could trigger reflected XSS attacks. 7) Regularly scan websites with specialized security tools that can detect XSS vulnerabilities and anomalous input handling. 8) Review and harden input validation and output encoding practices in custom code interfacing with the plugin, if applicable. These targeted actions go beyond generic advice by focusing on the specific plugin and attack vector involved.