CVE-2020-5651 in Simple Download Monitor
Summary
by MITRE • 10/21/2020
SQL injection vulnerability in Simple Download Monitor 3.8.8 and earlier allows remote attackers to execute arbitrary SQL commands via a specially crafted URL.
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Analysis
by VulDB Data Team • 11/25/2020
The vulnerability identified as CVE-2020-5651 represents a critical SQL injection flaw within the Simple Download Monitor plugin for WordPress, affecting versions 3.8.8 and earlier. This vulnerability resides in the plugin's handling of user-supplied input within URL parameters, creating an exploitable entry point for malicious actors to manipulate database queries. The flaw stems from inadequate input validation and sanitization mechanisms that fail to properly escape or filter user-provided data before incorporating it into SQL command structures.
The technical implementation of this vulnerability occurs when the plugin processes download requests through URL parameters that are directly used in database queries without proper sanitization. Attackers can craft malicious URLs containing specially formatted SQL payloads that, when processed by the vulnerable plugin, result in unauthorized database access. This allows threat actors to execute arbitrary SQL commands, potentially leading to data theft, database modification, or complete system compromise. The vulnerability falls under CWE-89 which specifically addresses SQL injection flaws where untrusted data is incorporated into SQL queries without proper escaping or parameterization.
From an operational perspective, this vulnerability poses significant risks to WordPress installations using the affected plugin version. Remote attackers can leverage this flaw to bypass authentication mechanisms, extract sensitive information from databases, modify or delete data, and potentially escalate privileges within the compromised system. The impact extends beyond simple data theft as attackers may use this vulnerability as a foothold for further exploitation, potentially leading to full system compromise or lateral movement within network environments. The vulnerability's remote exploitability means that attackers do not require local access or credentials to initiate the attack, making it particularly dangerous in publicly accessible web environments.
The exploitation of this vulnerability aligns with tactics described in the MITRE ATT&CK framework under the T1190 technique for exploiting vulnerabilities in web applications. Security professionals should implement immediate mitigations including updating to the patched version of Simple Download Monitor, implementing web application firewalls to detect and block malicious SQL injection patterns, and conducting thorough security assessments of all installed WordPress plugins. Additionally, organizations should enforce proper input validation practices, implement proper database user permissions, and establish monitoring systems to detect anomalous database access patterns that may indicate exploitation attempts.
Organizations should prioritize patch management processes to ensure all WordPress installations are updated to the latest plugin versions that address this vulnerability. The remediation process should include comprehensive testing to verify that updates do not introduce compatibility issues with existing website functionality while ensuring that all systems are protected against this specific SQL injection threat. Regular security audits of installed plugins and themes should be conducted to identify and remediate similar vulnerabilities before they can be exploited by threat actors.