CVE-2021-47954

8.2

LayerBB · LayerBB

LayerBB 1.1.4 contains an SQL injection vulnerability in the search query parameter, enabling unauthenticated remote attackers to execute arbitrary SQL commands.

Executive summary

A critical SQL injection vulnerability in LayerBB 1.1.4 allows unauthenticated remote attackers to bypass security controls and access backend database contents.

Vulnerability

This is an SQL injection (CWE-89) vulnerability where the search query parameter fails to properly neutralize special elements. The vulnerability is accessible to unauthenticated attackers (AV:N/AC:L/PR:N/UI:N), significantly increasing the potential attack surface.

Business impact

The ability for an unauthenticated attacker to inject SQL commands poses a severe threat to the confidentiality of the application's database. With a CVSS score of 8.2, this vulnerability could result in unauthorized access to sensitive user data, intellectual property, or administrative credentials stored within the database.

Remediation

Immediate Action: Apply vendor security updates immediately if available; otherwise, implement strict input sanitization on all search parameters.

Proactive Monitoring: Review application logs for suspicious search strings containing SQL syntax or special characters indicative of injection attempts.

Compensating Controls: Utilize a Web Application Firewall (WAF) to filter and block malicious search queries that contain SQL injection payloads.

Exploitation status

Public Exploit Available: Yes — an ExploitDB entry exists (ID 49593).

Analyst recommendation

The presence of a public exploit increases the urgency of this remediation. System administrators must monitor for anomalous traffic directed at the search functionality and ensure that all input fields are properly sanitized to prevent unauthorized database access.