CVE-2025-62099 identifies a missing authorization vulnerability (CWE-862) in the Approveme Signature Add-On for Gravity Forms, a WordPress plugin that facilitates digital signature collection within forms. The vulnerability arises from incorrectly configured access control security levels, allowing users with limited privileges (PR:L) to perform unauthorized actions that should be restricted. The CVSS 3.1 base score is 4.3 (medium), reflecting that the attack vector is network-based (AV:N), requires low attack complexity (AC:L), and privileges (PR:L), but no user interaction (UI:N). The impact is limited to integrity (I:L), with no confidentiality (C:N) or availability (A:N) impact. This means an attacker with some level of authenticated access can manipulate or alter signature data or workflows without proper authorization, potentially undermining the trustworthiness of signed documents. The affected versions include all versions up to 1.8.6, with no patch links currently available, and no known exploits reported in the wild. The vulnerability was reserved in October 2025 and published at the end of 2025. Given the plugin’s role in legal and compliance workflows, unauthorized modifications could have regulatory and operational consequences. The vulnerability is specific to the Approveme Signature Add-On integrated with Gravity Forms, a popular form builder plugin for WordPress, which is widely used across many sectors including legal, finance, and government services.

For European organizations, the primary impact of CVE-2025-62099 lies in the potential compromise of data integrity within digital signature workflows. Unauthorized users with limited privileges could alter signature data or submission records, potentially invalidating legally binding documents or contracts. This could lead to compliance violations under regulations such as GDPR, eIDAS, and other data protection or electronic signature laws prevalent in Europe. While confidentiality and availability are not directly affected, the integrity breach could undermine trust in digital processes and cause operational disruptions, especially in sectors relying heavily on digital signatures like finance, legal, and public administration. The risk is heightened in organizations that do not enforce strict role-based access controls or that use outdated plugin versions. Since the vulnerability requires some level of privilege, insider threats or compromised user accounts pose a realistic exploitation vector. The absence of known exploits reduces immediate risk but does not eliminate the threat, especially once exploit code becomes available.

1. Monitor Approveme and Gravity Forms vendor channels for official patches or updates addressing CVE-2025-62099 and apply them promptly once released. 2. Conduct an immediate audit of user roles and permissions within WordPress environments using the Signature Add-On to ensure the principle of least privilege is enforced, removing unnecessary privileges from users. 3. Implement strict access control policies specifically for signature-related functions and data, possibly using additional WordPress security plugins that enforce granular permissions. 4. Enable logging and monitoring of all actions related to the Signature Add-On to detect unauthorized access or modifications early. 5. Consider isolating or segmenting WordPress instances handling sensitive signature workflows to limit lateral movement in case of compromise. 6. Educate administrators and users about the risks of privilege misuse and encourage strong authentication mechanisms such as MFA to reduce the risk of account compromise. 7. Regularly back up signature data and form submissions to enable recovery in case of integrity violations. 8. Review and test incident response plans to include scenarios involving unauthorized modification of digital signature data.