CVE-2025-66088 is a Missing Authorization vulnerability identified in Property Hive, a property management plugin widely used in real estate platforms. The vulnerability exists due to incorrectly configured access control security levels, which fail to properly restrict unauthorized users from performing sensitive operations. Specifically, versions up to and including 2.1.12 are affected, allowing remote attackers to modify data without authentication or user interaction. The CVSS 3.1 base score of 7.5 reflects a high severity, with an attack vector of network (AV:N), low attack complexity (AC:L), no privileges required (PR:N), and no user interaction (UI:N). The impact is primarily on data integrity (I:H), with no direct confidentiality (C:N) or availability (A:N) impact. This means attackers can alter property data or configurations, potentially leading to misinformation, fraud, or operational disruptions. No public exploits have been reported yet, but the vulnerability's nature makes it a prime target for attackers seeking to manipulate property listings or related information. The vulnerability was reserved in November 2025 and published in December 2025, indicating recent discovery and disclosure. The lack of available patches at the time of reporting necessitates immediate attention to access control policies and monitoring.

For European organizations, especially those in real estate and property management sectors using Property Hive, this vulnerability poses a significant risk to data integrity. Unauthorized modification of property data can lead to misinformation, financial fraud, loss of customer trust, and potential regulatory non-compliance under GDPR if personal data is affected indirectly. The absence of confidentiality or availability impact reduces risks of data leaks or service outages but does not diminish the threat of manipulated data leading to business disruption. Attackers exploiting this flaw remotely without authentication can target multiple organizations simultaneously, increasing the scale of potential damage. Given the importance of accurate property data in transactions and legal processes, compromised data integrity could have cascading effects on contracts, valuations, and customer relations. The threat is particularly relevant for organizations that have not implemented strict access control policies or those relying on default configurations.

Organizations should immediately audit their Property Hive installations to identify affected versions (<= 2.1.12) and restrict network access to the management interfaces. Until official patches are released, implement compensating controls such as IP whitelisting, web application firewalls (WAF) with custom rules to block unauthorized modification attempts, and enhanced logging to detect suspicious activities. Review and tighten access control configurations within Property Hive and underlying platforms to ensure only authorized users can perform sensitive operations. Regularly monitor logs for anomalous changes or access patterns. Engage with the vendor or community for timely patch releases and apply updates promptly once available. Additionally, conduct security awareness training for administrators to recognize potential exploitation attempts. Consider isolating Property Hive instances in segmented network zones to limit exposure. Finally, prepare incident response plans specific to data integrity incidents involving property data.