Vulnerability record · CVE-2025-43960 · published 25 August 2025

CVE-2025-43960: Adminer deserialization of untrusted data vulnerability

Adminer · Adminer

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.

8.6 CVSS 3.1 High EPSS 0.73% · top 47.6% CWE-502 · Deserialization of untrusted data

8.6CVSS 3.1 base score

0.73%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

4References, 1 tagged exploit

17 Jun 2026Last modified by NVD

Description

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

Adminer Adminer

References

Link	Tags
https://github.com/Seldaek/monolog	Product
https://github.com/far00t01/CVE-2025-43960	ExploitThird Party Advisory
https://github.com/vrana/adminer/compare/v4.8.1...v4.8.2	Release Notes
https://www.adminer.org	Product

Track CVE-2025-43960 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

7.2CVE-2021-21311Adminer server-side request forgery in bundled driver buildsAdminer versions 4.0.0 through 4.7.8 contain a server-side request forgery flaw, affecting builds that bundle all drivers such as adminer.php. An una…KEVEPSS 98%analysed11 Feb 2021 9.8CVE-2018-7667Adminer server-side request forgery (ssrf) vulnerabilityAdminer through 4.3.1 has SSRF via the server parameter.EPSS 4.4%5 Mar 2018 7.5CVE-2026-25892Adminer improper input validation vulnerabilityAdminer is open-source database management software. Adminer v5.4.1 and earlier has a version check mechanism where adminer.org sends signed version …EPSS 1.9%9 Feb 2026 7.5CVE-2021-43008Adminer vulnerabilityImproper 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 …EPSS 14%5 Apr 2022 6.1CVE-2021-29625Adminer cross-site scripting vulnerabilityAdminer 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, …EPSS 9.6%19 May 2021 6.1CVE-2020-35572Adminer cross-site scripting vulnerabilityAdminer through 4.7.8 allows XSS via the history parameter to the default URI.EPSS 2.0%9 Feb 2021 9.8CVE-2021-23758Ajax.NET Professional ajaxpro.2 untrusted deserialization RCEAll versions of the ajaxpro.2 package (Ajax.NET Professional) deserialize untrusted data and permit deserialization of arbitrary .NET classes. That l…KEVEPSS 83%analysed3 Dec 2021 9.8CVE-2026-63077JetBrains TeamCity unauthenticated RCE via agent polling deserializationJetBrains TeamCity before 2026.1.3 and 2025.11.7 deserializes untrusted data received through the agent polling protocol, allowing unauthenticated re…KEVEPSS 9.8%analysed27 Jul 2026

Source: NIST National Vulnerability Database (record CVE-2025-43960), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.