CVE-2026-25614 in Blesta
Summary
by MITRE • 02/03/2026
Blesta 3.x through 5.x before 5.13.3 allows object injection, aka CORE-5680.
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Analysis
by VulDB Data Team • 02/04/2026
The vulnerability identified as CVE-2026-25614 represents a critical object injection flaw within the Blesta billing and automation platform affecting versions 3.x through 5.x prior to 5.13.3. This issue falls under the broader category of insecure deserialization vulnerabilities, which are classified as CWE-502 in the Common Weakness Enumeration catalog. The vulnerability stems from the application's improper handling of serialized data objects during the processing of user input, creating opportunities for attackers to inject malicious objects that can be executed within the application's runtime environment.
The technical exploitation of this vulnerability occurs when Blesta processes serialized data without adequate validation or sanitization of input parameters. Attackers can craft malicious serialized objects that, when deserialized by the application, trigger unintended code execution or object manipulation. This type of attack vector is particularly dangerous because it can bypass traditional input validation mechanisms and directly target the application's object handling capabilities. The vulnerability is classified under the ATT&CK framework as a Deserialization of Untrusted Data technique, which is commonly used to achieve remote code execution in web applications.
The operational impact of this vulnerability extends beyond simple data corruption or unauthorized access. An attacker who successfully exploits this vulnerability could potentially gain full control over the affected Blesta installation, allowing for complete system compromise including data exfiltration, privilege escalation, and persistence mechanisms. The affected versions span multiple major releases, indicating this was a persistent flaw that required significant development effort to address properly. Organizations using Blesta for billing automation, customer management, and service provisioning face substantial risk if they operate on vulnerable versions, as these systems often contain sensitive financial and personal data.
Mitigation strategies for CVE-2026-25614 require immediate patching of affected systems to version 5.13.3 or later, which contains the necessary fixes for proper object serialization validation. Organizations should implement comprehensive input validation at all entry points where serialized data is processed, ensuring that only trusted and properly formatted objects are accepted. Network segmentation and monitoring should be enhanced to detect anomalous deserialization patterns, while regular security assessments should verify that no unauthorized modifications have occurred. The fix typically involves implementing stricter validation of serialized object types and ensuring that deserialization operations occur within secure contexts that prevent arbitrary code execution. Additionally, organizations should conduct thorough testing of the patched environment to ensure that legitimate functionality remains intact while the vulnerability is properly addressed.