CVE-2025-43700 is a high-severity vulnerability identified in Salesforce OmniStudio, specifically affecting the FlexCards component prior to the Spring 2025 release. The vulnerability is categorized under CWE-281, which pertains to improper preservation of permissions. This flaw allows unauthorized exposure of encrypted data due to incorrect handling or enforcement of permission settings within the OmniStudio FlexCards. The CVSS 3.1 base score of 7.5 reflects a high impact primarily on confidentiality (C:H), with no impact on integrity or availability. The attack vector is network-based (AV:N), requiring no privileges (PR:N) or user interaction (UI:N), making it remotely exploitable by unauthenticated attackers. The scope is unchanged (S:U), indicating the vulnerability affects only the vulnerable component without extending to other system components. The core technical issue is that permission checks or preservation mechanisms fail to properly restrict access to sensitive encrypted data, potentially allowing attackers to retrieve data that should remain protected. Although no known exploits are reported in the wild as of the publication date, the ease of exploitation and the critical nature of the data involved make this a significant risk for organizations using affected versions of Salesforce OmniStudio. The lack of available patches at the time of disclosure emphasizes the need for immediate attention and mitigation by affected users.

For European organizations leveraging Salesforce OmniStudio, this vulnerability poses a substantial risk to the confidentiality of sensitive business data, including potentially encrypted customer information, internal communications, or proprietary data managed within FlexCards. Exposure of encrypted data could lead to data breaches, regulatory non-compliance (notably with GDPR), reputational damage, and financial penalties. Given Salesforce's widespread adoption across various sectors in Europe—including finance, healthcare, retail, and public services—the impact could be broad and severe. The vulnerability's remote exploitability without authentication increases the threat surface, potentially allowing external attackers to access sensitive data without insider access. This is particularly concerning for organizations handling personal data of EU citizens, where data protection laws impose strict requirements. Additionally, the absence of integrity or availability impact limits the threat to data confidentiality; however, the exposure of encrypted data could facilitate further attacks or decryption attempts if attackers obtain cryptographic material or exploit other weaknesses.

Immediate mitigation should focus on minimizing exposure until Salesforce releases an official patch. Organizations should: 1) Review and restrict network access to OmniStudio FlexCards interfaces, implementing strict firewall rules and network segmentation to limit exposure to trusted users and systems only. 2) Enforce strong access controls and monitor usage logs for anomalous access patterns to detect potential exploitation attempts early. 3) Apply principle of least privilege to all users and service accounts interacting with OmniStudio components. 4) Temporarily disable or limit the use of FlexCards features that handle sensitive encrypted data if feasible. 5) Engage with Salesforce support to obtain timelines for patch availability and apply updates promptly once released. 6) Conduct internal audits of data encryption key management and consider additional encryption layers or tokenization for highly sensitive data. 7) Educate security and IT teams about the vulnerability specifics to enhance monitoring and incident response readiness. These steps go beyond generic advice by focusing on network-level controls, operational restrictions, and proactive monitoring tailored to the nature of the vulnerability and the affected product.