CVE-2026-25892 Scanner

Adminer is a popular open-source web-based tool used primarily for managing content in relational databases such as MySQL, PostgreSQL, SQLite, and others. It is widely utilized by database administrators and developers for its lightweight design and easy installation compared to other database management tools. Adminer's primary purpose is to provide users with a simple and efficient way to execute SQL commands, manage database structures, and interact with data. Often, web developers leverage Adminer during development to effortlessly manage and view database content. It is used globally due to its simplicity and the ability to run entirely from a single PHP file. However, as with many such tools, the security of Adminer is paramount due to the sensitive nature of the data it can handle.

The Denial of Service (DoS) vulnerability in Adminer results from the tool's lack of origin validation within its version check endpoint. This flaw permits attackers to trigger server errors using crafted POST requests. The exploit does not require special privileges, making it particularly dangerous as any unauthorized user can exploit it. Without appropriate mitigations, this vulnerability can disrupt the intended functionality of Adminer by overwhelming it with server errors. Such vulnerabilities are significant as they could render the service unusable for all legitimate users, thereby hindering database management operations. Recognizing the potential for misuse, developers and administrators are urged to address this vulnerability promptly to maintain service availability.

The vulnerability concerns Adminer versions 4.6.2 to 5.4.1 where malicious actors can send specially crafted POST requests to the version check endpoint. The endpoint fails to validate the origin of such requests adequately, leading to possible server errors. These errors, if triggered, result in a denial of service as the system continues to error out, preventing regular operations. The vulnerable parameter in this context is the version check endpoint that interacts with the crafted POST requests. Given that Adminer is designed to handle database operations, maintaining its integrity is crucial. Users should be aware that patching to a secure version will help mitigate this issue substantially.

Exploiting this vulnerability could lead to severe disruptions in database administration and access, which could paralyze business operations reliant on these databases. By causing continual server errors, threats can prevent legitimate access and operations on the database, potentially leading to data access downtime. While it does not directly compromise data integrity or confidentiality, the damage to availability can be considerable. The exploitation may impact the performance of dependent applications and services, thereby introducing significant operational risks. This makes timely addressing of the vulnerability critical for maintaining system reliability.

REFERENCES

• https://github.com/vrana/adminer/security/advisories/GHSA-q4f2-39gr-45jh
• https://github.com/vrana/adminer/commit/21d3a3150388677b18647d68aec93b7850e457d3