CVE-2025-5878 Overview
A vulnerability has been identified in ESAPI (Enterprise Security API) esapi-java-legacy affecting the Encoder.encodeForSQL interface used for SQL Injection defense. This security flaw involves improper neutralization of special elements, which can undermine the intended SQL injection protection mechanisms. The vulnerability can be exploited remotely, and exploit information has been publicly disclosed. The ESAPI project demonstrated exceptional professionalism in handling this security issue after being contacted early in the disclosure process.
Critical Impact
Applications relying on ESAPI's Encoder.encodeForSQL for SQL injection protection may have weakened defenses, potentially allowing attackers to bypass security controls and inject malicious SQL commands.
Affected Products
- ESAPI esapi-java-legacy versions prior to 2.7.0.0
Discovery Timeline
- June 29, 2025 - CVE-2025-5878 published to NVD
- November 3, 2025 - Last updated in NVD database
Technical Details for CVE-2025-5878
Vulnerability Analysis
This vulnerability resides in the SQL Injection defense mechanism within the ESAPI Java library, specifically in the Encoder.encodeForSQL interface. The core issue involves improper input validation (CWE-20), where the encoding function fails to properly neutralize special elements that could be used in SQL injection attacks. This means applications that rely on this ESAPI function for SQL injection protection may not receive the expected level of security, leaving them vulnerable to SQL-based attacks.
The vulnerability is network-accessible, meaning an attacker can exploit it remotely without requiring authentication or user interaction. When successfully exploited, an attacker could potentially bypass the SQL encoding protections and craft malicious SQL queries that the application processes as legitimate commands.
Root Cause
The root cause stems from improper input validation in the Encoder.encodeForSQL implementation. The encoding function does not adequately handle all special elements that could be leveraged for SQL injection attacks. This results in incomplete sanitization of user-supplied input before it is incorporated into SQL queries, allowing specially crafted payloads to pass through the defense mechanism.
Attack Vector
The attack is initiated remotely through the network. An attacker would craft malicious input containing SQL injection payloads specifically designed to bypass the encodeForSQL function's protection mechanisms. This input would be submitted to an application that relies on ESAPI's SQL encoding for protection, and due to the improper neutralization, the malicious SQL elements would not be properly escaped or filtered, allowing the injection attack to succeed.
The vulnerability has been addressed through two commits. The first commit (f75ac2c2647a81d2cfbdc9c899f8719c240ed512) disables the vulnerable feature by default and triggers a warning when usage is attempted. The second commit (e2322914304d9b1c52523ff24be495b7832f6a56) updates the misleading Java class documentation to warn developers about the associated risks.
Detection Methods for CVE-2025-5878
Indicators of Compromise
- Unusual SQL query patterns in application logs that may indicate injection attempts
- Error messages or exceptions related to SQL syntax errors from backend databases
- Unexpected database modifications or data exfiltration activity
- Application behavior suggesting successful SQL injection exploitation
Detection Strategies
- Review application dependencies for ESAPI esapi-java-legacy versions prior to 2.7.0.0
- Scan application source code for usage of Encoder.encodeForSQL interface
- Implement database query monitoring to detect anomalous SQL patterns
- Deploy Web Application Firewall (WAF) rules to identify SQL injection attempts targeting known bypass techniques
Monitoring Recommendations
- Enable detailed logging on database servers to capture all SQL queries
- Monitor application logs for warnings triggered by deprecated encodeForSQL usage
- Implement real-time alerting for SQL injection attack signatures
- Track security events related to database access and query execution
How to Mitigate CVE-2025-5878
Immediate Actions Required
- Upgrade ESAPI esapi-java-legacy to version 2.7.0.0 or later immediately
- Review all application code that uses Encoder.encodeForSQL and consider alternative SQL injection defenses
- Implement parameterized queries or prepared statements as the primary SQL injection prevention mechanism
- Deploy additional input validation layers independent of ESAPI encoding
Patch Information
The vulnerability has been addressed in ESAPI esapi-java-legacy version 2.7.0.0. Two specific commits were made to remediate the issue:
- Commit f75ac2c2647a81d2cfbdc9c899f8719c240ed512 - Disables the vulnerable feature by default and warns on usage attempts
- Commit e2322914304d9b1c52523ff24be495b7832f6a56 - Updates misleading documentation to warn about risks
For additional details, refer to the ESAPI Security Bulletin 13 and the official release notes for v2.7.0.0. Debian users should also review the Debian LTS Security Announcement.
Workarounds
- Avoid using Encoder.encodeForSQL and instead use parameterized queries or prepared statements for all database interactions
- Implement additional input validation and sanitization before any data reaches the SQL encoding layer
- Use database-specific escaping functions provided by your JDBC driver or ORM framework
- Deploy a Web Application Firewall (WAF) with SQL injection protection rules as a defense-in-depth measure
# Maven dependency update to patched version
# Update pom.xml to use ESAPI 2.7.0.0 or later:
# <dependency>
# <groupId>org.owasp.esapi</groupId>
# <artifactId>esapi</artifactId>
# <version>2.7.0.0</version>
# </dependency>
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
