Adminer vulnerabilities
Published CVEs affecting Adminer products: 2 record(s), with severity, exploitation and fixes.
CVE-2026-25892
High · 7.5
Public exploit CWE-20 Feb 9, 2026
Adminer has an Unauthenticated Persistent DoS via Array Injection in ?script=version Endpoint
Adminer is open-source database management software. Adminer v5.4.1 and earlier has a version check mechanism where adminer.org sends signed version info via JavaScript postMessage, which the browser then POSTs to ?script=version. This endpoint lacks origin validation and accepts POST data from any source. An attacker can POST version[] parameter which PHP converts to an array. On next page load, openssl_verify() receives this array instead of string and throws TypeError, returning HTTP 500 to all users. Upgrade to Adminer 5.4.2.
CVE-2021-21311
High · 7.2
KEV High · 69 Public exploit CWE-918 Feb 11, 2021
Adminer Server-Side Request Forgery Vulnerability
Adminer is an open-source database management in a single PHP file. In adminer from version 4.0.0 and before 4.7.9 there is a server-side request forgery vulnerability. Users of Adminer versions bundling all drivers (e.g. `adminer.php`) are affected. This is fixed in version 4.7.9.