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    CVE-2026-56702

    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.

    Published:Aug 25, 2026
    Last Modified:Aug 27, 2026
    EPS:Aug 25, 2026
    EPSS Score:0.00343
    CVSS Score:8.8

    Affected Products

    Vendor
    Adminer
    Product
    Adminer
    Vendor
    Vrana
    Product
    Adminer

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-1 Accessing Functionality Not Properly Constrained by ACLs

    Related CVEs

    CVE-2026-56706 (CVSS 6.1) — Adminer before 5.4.3 uses a CSRF token scheme that transmits both the XOR mask and the masked value in every t…
    CVE-2026-56705 (CVSS 9.3) — Adminer before 5.4.3 fails to sanitize the server field before constructing a PDO DSN string, allowing unauthe…
    CVE-2026-56704 (CVSS 5.3) — Adminer before 5.4.3 inserts unsanitized database server version strings into script tags with valid CSP nonce…
    CVE-2026-56703 (CVSS 8.6) — Adminer before 5.4.3 contains a remote code execution vulnerability in SQLite query handling where VACUUM INTO…
    CVE-2026-34968 (CVSS 7.2) — Adminer before 5.4.3 contains an arbitrary file deletion vulnerability in SQLite mode where the database-list …
    CVE-2026-34967 (CVSS 5.3) — Adminer versions 5.3.0 through 5.4.2 with the sql-log plugin enabled contain an arbitrary file write vulnerabi…
    CVE-2026-34964 (CVSS 6.9) — Adminer before 5.5.0 contains a server-side request forgery vulnerability in the login form's server field val…
    CVE-2026-34959 (CVSS 5.3) — Adminer 4.6.0 before 5.5.0 prepends the client-supplied X-Forwarded-Prefix header to $_SERVER["REQUEST_URI"] w…
    CVE-2026-16434 (CVSS 2.3) — Adminer 4.6.0 through 5.5.0 (fixed in 5.5.1) contains an incomplete fix for a prior X-Forwarded-Prefix vulnera…
    CVE-2026-15686 (CVSS 7.2) — Adminer multi_query Incorrect Check of Function Return Value Remote Code Execution Vulnerability. This vulnera…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High