vrana Adminer up to 6.0.1 Elasticsearch Driver auth.inc.php Driver::connect auth_server/auth_username/auth_password server-side request forgery

Summaryinfo

A vulnerability described as problematic has been identified in vrana Adminer up to 6.0.1. This affects the function Driver::connect of the file adminer/include/auth.inc.php of the component Elasticsearch Driver. Such manipulation of the argument auth_server/auth_username/auth_password leads to server-side request forgery. This vulnerability is referenced as CVE-2026-100696. It is possible to launch the attack remotely. No exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in vrana Adminer up to 6.0.1. It has been rated as problematic. Affected by this issue is the function Driver::connect of the file adminer/include/auth.inc.php of the component Elasticsearch Driver. The manipulation of the argument auth_server/auth_username/auth_password with an unknown input leads to a server-side request forgery vulnerability. Using CWE to declare the problem leads to CWE-918. The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. Impacted is confidentiality. CVE summarizes:

Adminer 4.16.0 through 6.0.1 contain a pre-authentication Server-Side Request Forgery (SSRF) vulnerability in the optional Elasticsearch driver (plugins/drivers/elastic.php), fixed in 6.0.2. Because adminer/include/auth.inc.php invokes Driver::connect() before the login result is validated, an unauthenticated attacker who submits crafted auth[server], auth[username], and auth[password] parameters can cause the Adminer server to issue an HTTP GET request (via get_url()/file_get_contents()) to an arbitrary reachable host and port. The driver validates only general server syntax and does not block loopback, private, link-local, or other reserved addresses; if no port is given it appends the default 9200, and Adminer's generic port check rejects ports below 1024. Selected JSON error fields from non-2xx Elasticsearch-style responses, as well as connection failures, are rendered on the login page, providing a port-scanning oracle and enabling internal network reconnaissance and service fingerprinting. Exploitation requires that the optional Elasticsearch driver be explicitly deployed (e.g., via the adminer/elastic.php template or an adminer_object() configuration; it is not loaded in a default build) and that PHP allow_url_fopen be enabled.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-100696 since 09/26/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available.

By approaching the search of inurl:adminer/include/auth.inc.php it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 6.0.2 eliminates this vulnerability.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

• vrana

Name

• Adminer

Version

• 6.0.0
• 6.0.1

Website

• Product: https://github.com/vrana/adminer/

CPE 2.3info

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Once again VulDB remains the best source for vulnerability data.

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