CVE-2025-43698 is a critical security vulnerability identified in Salesforce OmniStudio, specifically affecting the FlexCards component prior to the Spring 2025 release. The vulnerability is classified under CWE-281, which pertains to improper preservation of permissions. In this case, the flaw allows an attacker to bypass field-level security controls on Salesforce objects. Field-level security is a fundamental access control mechanism that restricts users from viewing or modifying specific fields within an object. The improper preservation of these permissions means that unauthorized users could potentially access sensitive data fields that should be restricted, leading to a breach of confidentiality and integrity. The CVSS v3.1 score of 9.1 (critical) reflects the high severity of this vulnerability, with an attack vector that is network-based (AV:N), requiring no privileges (PR:N) and no user interaction (UI:N), making exploitation feasible remotely and without authentication. The impact includes unauthorized disclosure and modification of sensitive data fields, although availability is not affected (A:N). No known exploits are currently reported in the wild, but the potential for exploitation is significant given the ease of attack and the critical nature of the data handled by Salesforce OmniStudio. The vulnerability affects all versions of OmniStudio before Spring 2025, indicating a broad scope of affected systems until patched. The lack of available patches at the time of publication increases the urgency for organizations to implement interim mitigations.

For European organizations, the impact of this vulnerability is substantial due to the widespread adoption of Salesforce products, including OmniStudio, across various sectors such as finance, healthcare, retail, and public services. Unauthorized access to sensitive customer or internal data could lead to severe data breaches, violating GDPR and other data protection regulations, resulting in legal penalties and reputational damage. The ability to bypass field-level security controls undermines trust in Salesforce's data protection capabilities and could facilitate insider threats or external attackers gaining elevated access. This could lead to exposure of personally identifiable information (PII), financial data, or intellectual property. Additionally, compromised data integrity may affect business processes and decision-making. The absence of required authentication or user interaction for exploitation increases the risk of automated attacks targeting vulnerable Salesforce OmniStudio deployments. Given the criticality of the vulnerability, European organizations using affected versions must prioritize remediation to maintain compliance and protect sensitive data assets.

1. Immediate upgrade to the Spring 2025 release of Salesforce OmniStudio once available, as this version addresses the vulnerability. 2. Until patches are applied, restrict network access to Salesforce OmniStudio environments by implementing IP whitelisting and VPN requirements to limit exposure to trusted users and networks. 3. Review and tighten Salesforce user roles and permissions, minimizing privileges and enforcing the principle of least privilege to reduce the potential impact of exploitation. 4. Implement monitoring and alerting for unusual access patterns or data queries within Salesforce OmniStudio, focusing on attempts to access restricted fields. 5. Conduct regular audits of field-level security settings and validate that permissions are correctly enforced across all Salesforce objects. 6. Engage with Salesforce support and subscribe to security advisories to receive timely updates on patches and mitigation guidance. 7. Consider deploying Web Application Firewalls (WAF) with custom rules to detect and block suspicious API calls or queries targeting field-level data. These measures collectively reduce the attack surface and help detect or prevent exploitation while awaiting official patches.