CVE-2025-29784 in Nameless
Summary
by MITRE • 04/18/2025
NamelessMC is a free, easy to use & powerful website software for Minecraft servers. In version 2.1.4 and prior, the s parameter in GET requests for forum search functionality lacks length validation, allowing attackers to submit excessively long search queries. This oversight can lead to performance degradation and potential denial-of-service (DoS) attacks. This issue has been patched in version 2.2.0.
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Analysis
by VulDB Data Team • 04/18/2025
The vulnerability identified as CVE-2025-29784 affects NamelessMC version 2.1.4 and earlier, representing a critical security flaw in the forum search functionality of this popular Minecraft server website software. This issue resides within the handling of GET requests where the s parameter processes user input without proper length validation, creating an avenue for malicious actors to exploit the system's resource management capabilities. The vulnerability specifically targets the search functionality that allows users to query forum content, making it a prime target for performance degradation attacks that can ultimately result in system unavailability.
The technical flaw manifests as a lack of input validation for the s parameter in GET requests, which serves as the search query input field for forum searches. This absence of length validation creates a condition where attackers can submit search queries of excessive length, potentially causing the application to consume disproportionate system resources during processing. The vulnerability falls under CWE-129, which addresses improper validation of input length, and can be categorized as a resource exhaustion attack vector. The flaw operates by allowing attackers to craft search requests that, when processed by the NamelessMC software, trigger excessive computational overhead and memory consumption.
The operational impact of this vulnerability extends beyond simple performance degradation to potentially enable full denial-of-service conditions that can render the forum search functionality unusable for legitimate users. When attackers submit excessively long search queries, the system's processing capabilities become overwhelmed, leading to resource exhaustion that can affect other system functions and overall user experience. This vulnerability can be exploited by attackers using techniques aligned with ATT&CK tactic TA0040 (Resource Exhaustion) and can be classified as a low-effort, high-impact attack vector. The DoS potential becomes particularly concerning in environments where forum search functionality is frequently accessed, as it can quickly degrade service availability and impact the broader server community.
Mitigation strategies for this vulnerability require immediate implementation of input length validation for the s parameter in all GET requests related to forum search functionality. Organizations should implement a reasonable maximum length limit for search queries, typically ranging from 255 to 1024 characters depending on the specific application requirements and system capacity. The patch released in version 2.2.0 addresses this issue by introducing proper input validation mechanisms that prevent excessively long search parameters from being processed. Additionally, system administrators should monitor search query patterns for unusual activity and implement rate limiting to further protect against abuse. The fix aligns with industry best practices for input validation and follows the principle of least privilege by ensuring that all user inputs are properly sanitized before processing. Organizations using affected versions should prioritize upgrading to version 2.2.0 or later, as this represents the definitive solution to the resource exhaustion vulnerability that could otherwise be exploited to disrupt service availability for legitimate users.