CVE-2025-7894 is a medium-severity SQL Injection vulnerability found in the Onyx software, specifically affecting versions 0.29.0 and 0.29.1. The vulnerability resides in the generate_simple_sql function located in the backend/onyx/agents/agent_search/kb_search/nodes/a3_generate_simple_sql.py file, which is part of the Chat Interface component. This flaw allows an attacker to manipulate SQL queries remotely without requiring user interaction or elevated privileges, potentially enabling unauthorized access or modification of the underlying database. The vulnerability arises due to improper sanitization or validation of input parameters used in SQL query construction, leading to injection of malicious SQL code. Although the CVSS 4.0 base score is 5.3 (medium severity), the attack vector is network-based with low attack complexity and no authentication required, which increases the risk profile. The vendor has not responded to the disclosure, and no patches have been released yet. While no known exploits are currently observed in the wild, public disclosure of the exploit code increases the likelihood of exploitation attempts. The vulnerability impacts the confidentiality, integrity, and availability of data managed by Onyx, as attackers could retrieve sensitive information, alter data, or disrupt service operations through crafted SQL commands.

For European organizations using Onyx versions 0.29.0 or 0.29.1, this vulnerability presents a significant risk to data security and operational continuity. Exploitation could lead to unauthorized data disclosure, data tampering, or denial of service, affecting customer trust and regulatory compliance, especially under GDPR requirements. Organizations in sectors such as finance, healthcare, and government that rely on Onyx for chat interface functionalities may face increased exposure to data breaches or service disruptions. The remote exploitability without authentication means attackers can target systems over the internet or internal networks, increasing the attack surface. The lack of vendor response and absence of patches necessitate immediate risk management actions to prevent potential exploitation. Additionally, the public availability of exploit details could accelerate attack attempts, making timely mitigation critical.

Given the absence of official patches, European organizations should implement the following specific measures: 1) Immediately audit and monitor all Onyx deployments for suspicious SQL query patterns or anomalous database activity indicative of injection attempts. 2) Employ Web Application Firewalls (WAFs) with custom rules to detect and block SQL injection payloads targeting the vulnerable generate_simple_sql function. 3) Restrict network access to Onyx backend components to trusted IP addresses and internal networks only, minimizing exposure. 4) If feasible, disable or isolate the Chat Interface component until a patch or vendor guidance is available. 5) Conduct code reviews and apply temporary input validation or parameterized queries in the affected code if source code access is possible. 6) Enhance logging and alerting on database errors and failed queries to detect exploitation attempts early. 7) Prepare incident response plans specific to SQL injection attacks to enable rapid containment and remediation. 8) Engage with the vendor or community for updates and patches, and plan for prompt deployment once available.