CVE-2025-59387 Overview
CVE-2025-59387 is an SQL injection vulnerability [CWE-89] affecting QNAP MARS (Multi-Application Recovery Service). Remote attackers can exploit the flaw to execute unauthorized code or commands against vulnerable installations. The issue is exploitable over the network without authentication or user interaction. QNAP has released a fix in MARS version 1.2.1.1686 and later, documented in security advisory QSA-25-53.
Critical Impact
Unauthenticated remote attackers can inject SQL statements to execute unauthorized code or commands on systems running affected versions of QNAP MARS.
Affected Products
- QNAP MARS (Multi-Application Recovery Service) versions prior to 1.2.1.1686
Discovery Timeline
- 2026-01-02 - CVE-2025-59387 published to NVD
- 2026-04-15 - Last updated in NVD database
Technical Details for CVE-2025-59387
Vulnerability Analysis
The vulnerability is an SQL injection flaw in QNAP MARS, a recovery service component used to restore application data. Attacker-controlled input reaches a database query without proper sanitization or parameterization. Because the issue is reachable over the network and requires no privileges or user interaction, an attacker can submit crafted requests directly to a vulnerable MARS endpoint.
QNAP's advisory states that successful exploitation allows attackers to execute unauthorized code or commands. This indicates the SQL injection can be escalated beyond data manipulation, likely through database engine features that interact with the underlying operating system or through impacts to application logic that performs privileged actions based on query results.
The weakness is classified under [CWE-89], improper neutralization of special elements used in an SQL command. See the QNAP Security Advisory QSA-25-53 for vendor-confirmed technical context.
Root Cause
The service constructs SQL statements that include untrusted input without using parameterized queries or input validation. This allows attacker-supplied payloads to alter the structure of executed queries.
Attack Vector
The attack is delivered over the network against the MARS service. An unauthenticated attacker submits crafted requests containing SQL metacharacters and statement fragments. No authentication credentials and no interaction from a legitimate user are required.
No verified public exploit code or proof-of-concept is available at the time of writing. Technical specifics beyond the vendor advisory have not been disclosed. Refer to the QNAP Security Advisory QSA-25-53 for vendor guidance.
Detection Methods for CVE-2025-59387
Indicators of Compromise
- Unexpected MARS service requests containing SQL metacharacters such as single quotes, UNION, SELECT, --, or stacked statements in URL parameters or request bodies.
- New or modified database entries, accounts, or scheduled tasks on QNAP devices running MARS.
- Outbound network connections initiated by MARS processes to unfamiliar hosts following inbound requests.
Detection Strategies
- Inspect web and application logs for the MARS service for query strings containing SQL syntax tokens or encoded variants.
- Correlate inbound requests to MARS endpoints with subsequent process execution or file system changes on the appliance.
- Apply web application firewall signatures for generic SQL injection patterns targeting QNAP management interfaces.
Monitoring Recommendations
- Monitor QNAP device firmware and MARS application versions across the fleet to identify hosts still running versions earlier than 1.2.1.1686.
- Alert on administrative actions or recovery operations initiated outside of approved change windows.
- Track authentication and authorization events from the MARS service for anomalies that may indicate post-exploitation activity.
How to Mitigate CVE-2025-59387
Immediate Actions Required
- Update QNAP MARS to version 1.2.1.1686 or later on all affected appliances.
- Restrict network access to MARS interfaces so they are not exposed to untrusted networks or the public internet.
- Review MARS and database logs for evidence of SQL injection attempts or unexpected query activity.
Patch Information
QNAP has addressed CVE-2025-59387 in MARS (Multi-Application Recovery Service) 1.2.1.1686 and later. Administrators should install the fixed version through the QNAP App Center on each NAS device. Patch details and download instructions are provided in the QNAP Security Advisory QSA-25-53.
Workarounds
- Disable or uninstall MARS on devices where the recovery service is not actively required until the patched version is installed.
- Place QNAP appliances behind a firewall and limit inbound access to management and recovery services to trusted administrative networks only.
- Require VPN access for administrators connecting to QNAP management interfaces from outside the corporate network.
# Configuration example: restrict inbound access to MARS service
# Replace <MARS_PORT> with the port used by the MARS service on your device
# and <ADMIN_SUBNET> with the trusted management subnet
iptables -A INPUT -p tcp --dport <MARS_PORT> -s <ADMIN_SUBNET> -j ACCEPT
iptables -A INPUT -p tcp --dport <MARS_PORT> -j DROP
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
