CVE-2026-57739 in AcyMailing SMTP Newsletter Plugin
Summary
by MITRE • 07/13/2026
Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in AcyMailing Newsletter Team AcyMailing SMTP Newsletter acymailing allows Blind SQL Injection.This issue affects AcyMailing SMTP Newsletter: from n/a through <= 10.11.0.
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Analysis
by VulDB Data Team • 07/13/2026
This sql injection vulnerability represents a critical security flaw in the acymailing smtp newsletter component that enables attackers to manipulate database queries through improperly sanitized input parameters. The vulnerability specifically manifests as blind sql injection, where attackers cannot directly see database contents but can infer information through response timing or conditional execution patterns. This weakness falls under the common weakness enumeration category CWE-89 which classifies improper neutralization of special elements used in sql commands as a fundamental flaw in application security architecture.
The technical implementation of this vulnerability occurs when user-supplied data enters the application without adequate sanitization or parameterization before being incorporated into sql query strings. In the context of acymailing smtp newsletter version 10.11.0 and earlier, input fields that handle email addresses, user identifiers, or configuration parameters are susceptible to malicious injection attempts. Attackers can exploit this by crafting specially formatted inputs that alter the intended sql execution flow, potentially allowing them to extract sensitive database information, modify records, or even execute arbitrary commands on the underlying database server.
The operational impact of this vulnerability extends beyond simple data compromise, as it provides attackers with persistent access vectors that can be leveraged for extended reconnaissance and lateral movement within affected systems. Organizations using vulnerable versions of acymailing smtp newsletter face significant risks including unauthorized data access, potential service disruption, and compliance violations related to data protection regulations. The blind nature of the injection means that attackers can systematically probe database structures without direct output, making detection more challenging while simultaneously increasing the potential for comprehensive information gathering.
Mitigation strategies should focus on implementing robust input validation and parameterized query execution throughout the application codebase. Organizations must immediately upgrade to patched versions of acymailing smtp newsletter beyond 10.11.0 to address this vulnerability. Additionally, implementing proper sql injection prevention techniques such as prepared statements, stored procedures with parameter binding, and comprehensive input sanitization routines will significantly reduce the attack surface. Security monitoring should include detection of unusual query patterns and automated scanning for similar vulnerabilities in related components. The ATT&CK framework categorizes this as a technique involving command injection and credential access, making it particularly dangerous when combined with other exploitation methods that may be employed during extended attack campaigns.