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CVE-2026-25892— Adminer has an Unauthenticated Persistent DoS via Array Injection in ?script=version Endpoint

Quick assessment

Affected
vrana adminer
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Adminer是Adminer开源的一个 WordPress 插件。允许 WordPress 管理员快速进行数据库管理。 Adminer 5.4.1及之前版本存在输入验证错误漏洞，该漏洞源于版本检查端点缺乏来源验证，可能导致拒绝服务。

CVSS 7.5 · High EPSS 2.07% · P81

Public Exploits 1

Nuclei · 1 CVE-2026-25892.yaml [template]

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter
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I. Basic Information for CVE-2026-25892

Vulnerability Information
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Vulnerability Title
Adminer has an Unauthenticated Persistent DoS via Array Injection in ?script=version Endpoint
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Adminer 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Adminer是Adminer开源的一个 WordPress 插件。允许 WordPress 管理员快速进行数据库管理。 Adminer 5.4.1及之前版本存在输入验证错误漏洞，该漏洞源于版本检查端点缺乏来源验证，可能导致拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
vrana adminer >= 4.6.2, < 5.4.2 -

II. Public POCs for CVE-2026-25892

# POC Description Source Link Shenlong Link
1 Adminer <= 5.4.1 contains a denial of service caused by lack of origin validation in version check endpoint, letting attackers trigger server errors via crafted POST requests, exploit requires no special privileges. https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-25892.yaml POC Details
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III. Intelligence Information for CVE-2026-25892

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Vendor Advisories for CVE-2026-25892 (1)

IV. Related Vulnerabilities

Same product: adminer
Same vendor: vrana
Same weakness: CWE-20

V. Comments for CVE-2026-25892

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