CVE-2026-74015 in Readabler Plugin
Summary
by MITRE • 08/18/2026
Unauthenticated SQL Injection in Readabler < 2.0.18 versions.
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Analysis
by VulDB Data Team • 08/18/2026
The vulnerability identified as an unauthenticated SQL injection flaw within Readabler versions prior to 2.0.18 represents a critical security deficiency that allows attackers to interfere with the queries an application makes to its underlying database. This specific class of weakness, categorized under CWE-89 in the Common Weakness Enumeration standard, arises from the failure to properly sanitize user-supplied input before incorporating it into SQL commands. In this context, the lack of authentication requirements significantly amplifies the severity of the issue because any individual on the internet can attempt to exploit the flaw without needing valid credentials or prior access to a protected session. This transforms what might otherwise be a high-severity internal vulnerability into an easily exploitable remote code execution vector accessible by untrusted actors across public networks.
From a technical perspective, SQL injection occurs when an application constructs dynamic SQL statements using concatenated strings derived from user input without employing parameterized queries or prepared statements as the primary defense mechanism. When Readabler processes requests containing maliciously crafted payloads in query parameters, form fields, or HTTP headers, it inadvertently executes these inputs as part of the database logic rather than treating them strictly as data values. This behavior enables an attacker to manipulate the structure of SQL commands, potentially bypassing intended access controls and retrieving sensitive information stored within the backend database. The operational impact is severe, encompassing unauthorized disclosure of confidential user data such as personal identifiable information, financial records, or proprietary business logic. Furthermore skilled attackers can leverage this vulnerability for more advanced attacks including modifying existing records to alter application behavior or deleting critical tables which leads to complete denial of service conditions and irreversible loss of organizational assets.
The exploitation path aligns with the ATT&CK technique T1190 Exploit Public-Facing Application, where adversaries target services exposed directly to the internet that contain known vulnerabilities. Because this flaw exists in versions older than 2.0.18 it suggests a lapse in timely patch management or secure development lifecycle practices regarding input validation and output encoding. The absence of authentication checks means there is no barrier preventing automated scanning tools from discovering and exploiting these endpoints at scale, increasing the likelihood of widespread compromise across multiple instances running outdated software versions. Organizations relying on Readabler must recognize that unauthenticated access points are particularly dangerous as they remove the layer of identity verification that typically limits an attacker's scope to only those privileges associated with a specific user account.
Mitigation strategies for this vulnerability prioritize immediate remediation through version upgrades and rigorous input validation practices. The most effective solution is to upgrade Readabler to version 2.0.18 or later where these SQL injection flaws have been addressed by the developers. If upgrading is not immediately feasible, organizations should implement strict input sanitization routines that reject any characters with special meaning in SQL syntax such as single quotes semicolons and comment markers unless they are part of a validated data structure. Additionally deploying Web Application Firewalls can provide an additional layer of defense by detecting and blocking common SQL injection patterns before they reach the application logic however this should be viewed as a compensatory control rather than a primary fix since sophisticated attackers often use obfuscation techniques to bypass signature-based detection systems. Regular security audits and penetration testing focused on database interaction points are also recommended to ensure that similar vulnerabilities do not exist elsewhere in the codebase.