Adminer: >> Adminer Security Vulnerabilities
Adminer 4.8.1, when using Monolog for logging, allows a Denial of Service (memory consumption) via a crafted serialized payload (e.g., using s:1000000000), leading to a PHP Object Injection issue. Remote, unauthenticated attackers can trigger this by sending a malicious serialized object, which forces excessive memory usage, rendering Adminer’s interface unresponsive and causing a server-level DoS. While the server may recover after several minutes, multiple simultaneous requests can cause a complete crash requiring manual intervention.
CVSS Score
8.6
EPSS Score
0.002
Published
2025-08-25
Improper Access Control in Adminer versions 1.12.0 to 4.6.2 (fixed in version 4.6.3) allows an attacker to achieve Arbitrary File Read on the remote server by requesting the Adminer to connect to a remote MySQL database.
CVSS Score
7.5
EPSS Score
0.836
Published
2022-04-05
Adminer is open-source database management software. A cross-site scripting vulnerability in Adminer versions 4.6.1 to 4.8.0 affects users of MySQL, MariaDB, PgSQL and SQLite. XSS is in most cases prevented by strict CSP in all modern browsers. The only exception is when Adminer is using a `pdo_` extension to communicate with the database (it is used if the native extensions are not enabled). In browsers without CSP, Adminer versions 4.6.1 to 4.8.0 are affected. The vulnerability is patched in version 4.8.1. As workarounds, one can use a browser supporting strict CSP or enable the native PHP extensions (e.g. `mysqli`) or disable displaying PHP errors (`display_errors`).
CVSS Score
7.5
EPSS Score
0.692
Published
2021-05-19
CVE-2021-21311
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.
Known exploited
CVSS Score
7.2
EPSS Score
0.938
Published
2021-02-11
Adminer through 4.7.8 allows XSS via the history parameter to the default URI.
CVSS Score
6.1
EPSS Score
0.048
Published
2021-02-09
Adminer through 4.3.1 has SSRF via the server parameter.
CVSS Score
9.8
EPSS Score
0.11
Published
2018-03-05