CVE-2025-57886 is an authorization bypass vulnerability classified under CWE-639 (Authorization Bypass Through User-Controlled Key) affecting the Accessibility Checker product by Equalize Digital, up to version 1.30.0. This vulnerability arises due to incorrectly configured access control security levels, allowing an attacker with limited privileges (PR:L) to manipulate user-controlled keys to bypass authorization checks. The vulnerability does not require user interaction (UI:N) and can be exploited remotely (AV:N). The scope is unchanged (S:U), meaning the impact is limited to the vulnerable component without affecting other system components. The vulnerability impacts integrity and availability, allowing an attacker to perform unauthorized actions or disrupt service, but does not affect confidentiality. The CVSS 3.1 base score is 5.4 (medium severity), reflecting the moderate risk posed by this flaw. No known exploits are currently reported in the wild, and no patches have been linked yet. The vulnerability is significant because accessibility checkers are often integrated into web development and compliance workflows, and improper authorization can lead to unauthorized modifications or denial of service in accessibility assessments.

For European organizations, this vulnerability poses a moderate risk especially to those relying on Equalize Digital's Accessibility Checker for compliance with EU accessibility directives such as the Web Accessibility Directive (Directive (EU) 2016/2102). Exploitation could allow attackers with limited privileges to bypass authorization controls, potentially altering accessibility reports or disrupting accessibility testing processes. This could lead to non-compliance with legal accessibility requirements, reputational damage, and operational disruption. Organizations in sectors with strict accessibility mandates, including public sector bodies, educational institutions, and large enterprises, may face increased scrutiny or penalties if accessibility assessments are compromised. Additionally, the integrity and availability impacts could affect automated workflows that depend on accurate accessibility data, leading to delays or errors in remediation efforts.

Organizations should implement strict access control policies and validate all user-controlled keys or parameters used in authorization decisions within the Accessibility Checker. Until an official patch is released, it is advisable to restrict access to the Accessibility Checker to trusted users and networks, employ network segmentation, and monitor for unusual access patterns or privilege escalations. Conduct thorough code reviews and penetration testing focused on authorization logic to identify similar weaknesses. Additionally, integrating multi-factor authentication for users with elevated privileges can reduce risk. Once a patch becomes available from Equalize Digital, prompt application is critical. Organizations should also maintain detailed logging and audit trails of accessibility checker usage to detect potential exploitation attempts.