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CVE-2026-56702— Adminer before 5.4.3 Unrestricted File Upload via AdminerFileUpload

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.

Jakub Vrána Adminer是Jakub Vrána个人开发者的一款轻量级的数据库管理工具。 Jakub Vrána Adminer 5.4.3之前版本存在任意文件上传漏洞，该漏洞源于AdminerFileUpload插件中默认扩展名白名单过于宽松，可能导致认证用户上传PHP WebShell文件，当uploadPath为Web服务目录时可执行任意代码。

CVSS 8.8 · High EPSS 0.62% · P48

Affected Version Matrix 2

VendorProduct Version RangeStatus
vrana adminer < 5.4.3 affected
5.4.3 unaffected
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I. Basic Information for CVE-2026-56702

Vulnerability Information
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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Adminer before 5.4.3 Unrestricted File Upload via AdminerFileUpload
Source: CVE Program / CVE List V5
Vulnerability Description
Adminer versions before 5.4.3 contain an unrestricted file upload vulnerability in the AdminerFileUpload plugin that allows authenticated users to upload PHP files by exploiting a permissive default extension allowlist. Attackers can upload PHP webshells to columns ending in _path and execute arbitrary code as the web-server user when uploadPath is web-served.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
危险类型文件的不加限制上传
Source: CVE Program / CVE List V5
Vulnerability Title
Jakub Vrána Adminer 任意文件上传漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Jakub Vrána Adminer是Jakub Vrána个人开发者的一款轻量级的数据库管理工具。 Jakub Vrána Adminer 5.4.3之前版本存在任意文件上传漏洞，该漏洞源于AdminerFileUpload插件中默认扩展名白名单过于宽松，可能导致认证用户上传PHP WebShell文件，当uploadPath为Web服务目录时可执行任意代码。
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 0 ~ 5.4.3 -

II. Public POCs for CVE-2026-56702

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 6937 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
100+ AI POC generations per month

III. Intelligence Information for CVE-2026-56702

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Vendor Advisories for CVE-2026-56702 (2)

Same Patch Batch · vrana · 2026-08-25 · 10 CVEs total

CVE-2026-56705 9.8 CRITICAL Adminer before 5.4.3 Remote Code Execution via MSSQL PDO DSN Injection
CVE-2026-34968 8.1 HIGH Adminer before 5.4.3 Arbitrary File Deletion via SQLite Drop
CVE-2026-56703 7.2 HIGH Adminer before 5.4.3 Remote Code Execution via SQLite VACUUM INTO
CVE-2026-56706 6.8 MEDIUM Adminer before 5.4.3 CSRF Token Secret Recovery via XOR Masking
CVE-2026-56704 6.1 MEDIUM Adminer before 5.4.3 Cross-Site Scripting via MySQL Version String
CVE-2026-34964 5.8 MEDIUM Adminer before 5.5.0 SSRF via PDO DSN Injection
CVE-2026-34967 5.4 MEDIUM Adminer sql-log Plugin 5.3.0 through 5.4.2 Arbitrary File Write
CVE-2026-34959 4.7 MEDIUM Adminer before 5.5.0 Open Redirect via X-Forwarded-Prefix
CVE-2026-16434 2.3 LOW Adminer before 5.5.1 X-Forwarded-Prefix Backslash Bypass

IV. Related Vulnerabilities

Same product: adminer
Same vendor: vrana
Same weakness: CWE-434

V. Comments for CVE-2026-56702

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