CVE-2025-49900 is an Incorrect Privilege Assignment vulnerability found in the bPlugins Advanced scrollbar plugin, specifically affecting versions up to 1.1.8. This vulnerability allows an attacker who already has some level of privileges (low privilege) to escalate their privileges to a higher level without requiring any user interaction. The vulnerability stems from improper assignment or enforcement of privilege levels within the plugin's code, which could allow unauthorized access to sensitive functions or administrative capabilities. The CVSS v3.1 base score of 8.8 reflects its high impact on confidentiality, integrity, and availability, with an attack vector over the network, low attack complexity, and no user interaction needed. Although no known exploits have been reported in the wild yet, the vulnerability's characteristics make it a significant risk, especially in environments where the plugin is deployed on publicly accessible web servers. The lack of available patches at the time of publication means organizations must implement interim controls to mitigate risk. The vulnerability could be leveraged to gain unauthorized administrative access, modify or delete data, or disrupt services, leading to potential data breaches or service outages.

For European organizations, exploitation of CVE-2025-49900 could lead to unauthorized privilege escalation within web applications using the bPlugins Advanced scrollbar plugin. This could result in attackers gaining administrative control, leading to data breaches, defacement, or disruption of services. Organizations in sectors with strict data protection regulations such as finance, healthcare, and government could face compliance violations and reputational damage. The network-exploitable nature means attackers can attempt exploitation remotely, increasing the threat surface. Given the plugin’s use in content management systems or web platforms, critical infrastructure or public-facing services could be targeted, affecting availability and trust. The high impact on confidentiality and integrity could expose sensitive user data or intellectual property. The absence of known exploits currently provides a window for proactive defense, but the potential for rapid weaponization exists. European entities with extensive web presence or reliance on third-party plugins are particularly at risk.

Organizations should immediately inventory their use of the bPlugins Advanced scrollbar plugin and identify affected versions (<=1.1.8). Until an official patch is released, restrict access to the plugin’s administrative interfaces by implementing strict access controls, such as IP whitelisting or VPN-only access. Review and harden user privilege assignments to ensure the principle of least privilege is enforced. Monitor logs for unusual privilege escalation attempts or anomalous behavior related to the plugin. Employ web application firewalls (WAFs) to detect and block suspicious requests targeting the plugin. Engage with the vendor or security community for updates on patches or workarounds. Conduct penetration testing focused on privilege escalation vectors within the plugin. Plan for rapid deployment of patches once available and communicate risks to relevant stakeholders. Additionally, consider isolating affected systems or employing compensating controls such as multi-factor authentication to reduce exploitation likelihood.