Skip to content
OpenAdvisories
High · 8.6 Public exploit CVE-2025-43960 EUVD-2025-25694GHSA-mqh4-2mm8-g7w9

Adminer PHP Object Injection issue leads to Denial of Service

Published Aug 25, 2025 · Updated Aug 25, 2025 · Assigned by mitre

Package: adminer Package: adminer Package: vrana/adminer Ecosystem: Debian Ecosystem: Packagist Ecosystem: Ubuntu

Description

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.

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

Debian

Security tracker ↗
ReleasePackageFixed inAdvisory
Debian 14 adminer No fix yet —
Debian 13 adminer No fix yet —
Debian 12 adminer No fix yet —

Ubuntu

Security tracker ↗
ReleasePackageFixed inAdvisory
Ubuntu 26.10 adminer No fix yet —
Ubuntu 26.04 LTS adminer No fix yet —
Ubuntu 25.10 adminer No fix yet —
Ubuntu 24.04 LTS adminer No fix yet —
Ubuntu 22.04 LTS adminer No fix yet —
Show 3 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
Ubuntu Pro 20.04 LTS adminer No fix yet —
Ubuntu Pro 18.04 LTS adminer No fix yet —
Ubuntu Pro 16.04 LTS adminer No fix yet —

Public exploits

Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

GitHub 1 repository

  • far00t01/CVE-2025-43960 ★ 3 · Apr 23, 2025

    CVE-2025-43960 - PHP Object Injection en Adminer < 4.8.1 con Monolog (DoS)

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

Affected packages

EcosystemPackageAffectedFixedRecord
Packagist vrana/adminer <= 4.8.1 — GHSA-mqh4-2mm8-g7w9

References