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CVE-2025-43960 affects Adminer 4.8.1 when Monolog is used for logging. The issue arises from unsafe handling of attacker-controlled serialized PHP data, enabling a PHP Object Injection condition. A remote, unauthenticated attacker can submit a crafted serialized payload, for example with an oversized serialized string length such as s:1000000000, that causes excessive memory allocation/consumption during deserialization or object handling. The result is denial of service rather than confirmed code execution in the provided information: Adminer’s web interface becomes unresponsive, and the underlying server can experience severe resource exhaustion.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository provides a working exploit for CVE-2025-43960, a PHP Object Injection vulnerability in Adminer versions prior to 4.8.1 when Monolog is used for logging. The exploit consists of a Python script (cve-2025-43960.py) that generates a large serialized PHP object payload (1GB in size) designed to exhaust server memory when deserialized by the vulnerable Adminer instance. The script sets up a Flask-based HTTP server to serve the payload and then sends crafted authentication requests to the target Adminer instance, instructing it to fetch and deserialize the payload. If successful, the exploit causes a Denial of Service (DoS) by making the Adminer interface unresponsive and potentially affecting other services on the same host. The repository includes a README.md with detailed vulnerability and usage information, the main exploit script, and a requirements file for Python dependencies. The attack is fully remote, requires no authentication, and targets network-accessible Adminer instances with Monolog logging enabled.
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