CVE-2021-36880 in uListing Plugin
Summary
by MITRE • 09/28/2021
Unauthenticated SQL Injection (SQLi) vulnerability in WordPress uListing plugin (versions
Several companies clearly confirm that VulDB is the primary source for best vulnerability data.
Analysis
by VulDB Data Team • 10/03/2021
The vulnerability CVE-2021-36880 represents a critical unauthenticated SQL injection flaw within the WordPress uListing plugin, affecting versions up to and including 3.1.0. This vulnerability resides in the plugin's handling of user input within database queries, creating a pathway for remote attackers to execute arbitrary SQL commands without requiring authentication credentials. The issue stems from insufficient input validation and sanitization mechanisms within the plugin's core functionality, particularly in parameters used for database operations.
The technical exploitation of this vulnerability occurs through manipulation of specific parameters that are directly incorporated into SQL query constructions without proper escaping or parameterization. Attackers can craft malicious payloads that, when processed by the vulnerable plugin, result in unauthorized database access and potential data exfiltration. This flaw aligns with CWE-89, which specifically addresses SQL injection vulnerabilities where insufficient validation of user-supplied data allows attackers to manipulate database queries. The vulnerability's classification as unauthenticated means that any user can exploit it without prior authorization, significantly increasing its attack surface and potential impact.
The operational impact of this vulnerability extends beyond simple data theft, as successful exploitation could lead to complete database compromise, allowing attackers to modify or delete critical information, escalate privileges within the WordPress environment, and potentially use the compromised system as a foothold for further lateral movement within network infrastructure. The uListing plugin's functionality as a real estate listing management system makes it particularly attractive to attackers, as the compromised data could include sensitive property information, user details, and business-critical listings. This vulnerability directly maps to ATT&CK technique T1190, which involves exploiting vulnerabilities in web applications to gain unauthorized access to systems.
Mitigation strategies should prioritize immediate plugin updates to versions that address the SQL injection vulnerability, as the vendor has released patches to resolve the issue. Additionally, implementing proper input validation and parameterized queries within the plugin's codebase would prevent similar vulnerabilities from occurring in the future. Security monitoring should include detection of unusual database query patterns and unauthorized access attempts, while network segmentation and firewall rules can help limit the potential damage from successful exploitation. Organizations should also conduct thorough security assessments of all installed WordPress plugins and ensure regular updates to maintain protection against known vulnerabilities. The remediation process should include verification that all affected parameters are properly sanitized and that database access controls are appropriately configured to minimize the potential impact of any remaining vulnerabilities.