CVE-2026-75979 in EasyReport
Summary
by MITRE • 08/19/2026
A vulnerability was found in xianrendzw EasyReport up to 2.0.17.0522_Beta. Affected is the function execSqlText/previewSqlText of the file DesignerController.java of the component SQL Preview Endpoint. The manipulation of the argument sqlText results in improper neutralization of special elements used in a template engine. The attack can be executed remotely. The exploit has been made public and could be used. The project was informed of the problem early through an issue report but has not responded yet.
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Analysis
by VulDB Data Team • 08/19/2026
The vulnerability identified in xianrendzw EasyReport, specifically affecting versions up to 2.0.17.0522_Beta, represents a critical server-side template injection flaw within the SQL Preview Endpoint component. This security defect is located in the DesignerController.java file, primarily impacting the execSqlText and previewSqlText functions which are responsible for processing user-supplied input before rendering it through an internal template engine. The core technical issue stems from improper neutralization of special elements used by the template engine when handling the sqlText argument. Instead of sanitizing or escaping potentially malicious payloads embedded within SQL queries, the application passes these inputs directly to the templating system without adequate validation checks. This lack of input validation allows an attacker to inject crafted template directives that are interpreted and executed by the server-side rendering logic rather than being treated as static text data.
From a technical perspective, this flaw aligns with CWE-94 Improper Control of Generation of Code (Code Injection), specifically manifesting as Server-Side Template Injection. The vulnerability arises because the application fails to distinguish between trusted template structures and untrusted user input. When an attacker submits a specially crafted SQL text payload containing template syntax such as Velocity, FreeMarker, or Thymeleaf expressions depending on the specific engine used by EasyReport, the server evaluates these expressions in its execution context. This capability transforms what appears to be a standard database query preview feature into a powerful remote code execution vector. The presence of public exploits further exacerbates the risk, indicating that automated tools can readily leverage this weakness against unpatched instances without requiring complex manual exploitation steps.
The operational impact of this vulnerability is severe due to its remote executability and lack of authentication requirements in many default configurations or exposed endpoints. An attacker located anywhere on the network with access to the EasyReport interface can exploit this flaw to achieve arbitrary code execution on the host system running the application server. This typically results in full compromise of the underlying operating system, allowing for data exfiltration, lateral movement within the internal network, and potential disruption of critical business operations dependent on reporting services. Since the project has not yet responded to early issue reports regarding this problem, organizations relying on these older beta versions remain exposed to active exploitation attempts that are already documented in public exploit repositories.
Mitigation strategies must prioritize immediate remediation given the availability of exploits in the wild. The most effective solution is to upgrade xianrendzw EasyReport to a version where this vulnerability has been patched by the vendor, ensuring that input sanitization logic correctly neutralizes special characters and template syntax before they reach the rendering engine. In cases where an update cannot be applied immediately due to compatibility constraints or lack of newer versions from the developer, network-level controls should be implemented as compensating measures. This includes restricting access to the DesignerController endpoints via firewall rules or reverse proxy configurations to only trusted IP addresses or administrative subnets. Additionally, deploying a Web Application Firewall with specific rule sets designed to detect and block template injection payloads can provide an additional layer of defense by intercepting malicious requests before they reach the vulnerable application logic. Continuous monitoring for anomalous behavior in server logs related to SQL preview endpoints is also recommended to identify potential exploitation attempts early.