CVE-2025-54786 is a medium-severity vulnerability affecting SuiteCRM-Core versions 7.14.6 up to but not including 7.14.7, and 8.8.0 up to but not including 8.8.1. SuiteCRM is an open-source Customer Relationship Management (CRM) platform widely used by enterprises for managing customer data and interactions. The vulnerability arises from broken authentication in the legacy iCal service component of SuiteCRM. Specifically, this flaw allows an unauthenticated attacker to access meeting data (calendar events) of any user if the attacker knows the username. The vulnerability also enables user enumeration through related functionality, which can aid attackers in identifying valid usernames within the system. The root cause is improper access control and authentication enforcement on the iCal service endpoints, leading to exposure of sensitive calendar information without requiring any authentication or user interaction. The CVSS v3.1 base score is 5.3, reflecting a medium severity level, with the vector indicating network attack vector (AV:N), low attack complexity (AC:L), no privileges required (PR:N), no user interaction (UI:N), unchanged scope (S:U), and limited confidentiality impact (C:L) without affecting integrity or availability. This vulnerability was publicly disclosed on August 6, 2025, and fixed in SuiteCRM versions 7.14.7 and 8.8.1. No known exploits are reported in the wild as of the publication date.

For European organizations using affected versions of SuiteCRM, this vulnerability poses a risk of unauthorized disclosure of sensitive meeting and calendar data. Such data may include confidential business meetings, strategic planning sessions, or personal information that could be leveraged for social engineering or further targeted attacks. The ability to enumerate valid usernames also facilitates reconnaissance activities by attackers, increasing the risk of subsequent credential-based attacks or phishing campaigns. While the vulnerability does not allow modification or deletion of data, the confidentiality breach can undermine trust, violate data protection regulations such as GDPR, and potentially expose organizations to compliance penalties. The risk is particularly significant for sectors handling sensitive customer or internal data, including finance, healthcare, legal, and government entities across Europe. The lack of authentication requirement and ease of exploitation over the network increase the likelihood of automated scanning and data harvesting attempts if systems remain unpatched.

European organizations should promptly upgrade SuiteCRM installations to versions 7.14.7 or 8.8.1 or later, where the vulnerability is fixed. Until patching is completed, organizations should consider disabling the legacy iCal service if it is not essential to business operations to eliminate the attack surface. Implement network-level access controls such as IP whitelisting or VPN restrictions to limit exposure of the SuiteCRM instance to trusted users only. Monitor web server and application logs for unusual access patterns indicative of username enumeration or unauthorized calendar data access. Conduct internal audits to identify any potential data leakage resulting from this vulnerability. Additionally, enforce strong username policies and consider multi-factor authentication for SuiteCRM access to reduce the impact of user enumeration. Finally, ensure that incident response plans include procedures for handling potential data exposure incidents related to CRM systems.