PostgreSQL SQL Injection Flaw (CVE-2025-27741) Exposes Databases to Data Theft
PostgreSQL users should update immediately to address CVE-2025-27741, a SQL injection flaw that could allow attackers to steal, alter, or delete sensitive data through unsafe query handling.
A newly disclosed SQL injection vulnerability in PostgreSQL could let attackers exfiltrate sensitive data, bypass application logic, and tamper with database content on one of the most widely used open-source relational database systems.
Vulnerability Overview
CVE-2025-27741 impacts PostgreSQL installations that use certain unsafe query construction patterns in conjunction with vulnerable library functions. The flaw allows maliciously crafted input to alter SQL queries dynamically, potentially leading to:
- Data exfiltration (reading sensitive tables)
- Privilege escalation (gaining access to restricted areas of the database)
- Data manipulation (inserting, updating, or deleting records without authorization)
While SQL injection vulnerabilities often stem from application-layer code, in this case specific PostgreSQL handling behaviors increase the risk when queries are not parameterized.
Attack Vectors & Potential Impact
- Web Applications: Any web-facing service connected to a vulnerable PostgreSQL instance could be exploited through input fields, URL parameters, or API calls.
- Chained Attacks: Attackers could combine SQL injection with other vulnerabilities to escalate privileges or pivot deeper into the infrastructure.
- Compliance Risks: Exposure of customer data could trigger GDPR, HIPAA, or PCI-DSS penalties.
Mitigation & Patching Guidance
- Upgrade PostgreSQL: Apply the latest security patch provided by the PostgreSQL Global Development Group.
- Use Prepared Statements: Always use parameterized queries instead of string concatenation.
- Review Application Code: Identify and remediate unsafe SQL construction patterns.
- Restrict Database Privileges: Limit account permissions so that even if SQL injection occurs, the damage is minimized.
ThreatGrid Takeaways
- SQL injection remains one of the oldest yet most persistent attack vectors — even mature databases like PostgreSQL can be affected.
- The combination of poor query handling and insufficient patching creates a prime target for attackers.
- Secure coding practices are non-negotiable in database-driven applications.
