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    CVE-2023-53956

    Flatnux 2021-03.25 contains an authenticated file upload vulnerability that allows administrative users to upload arbitrary PHP files through the file manager. Attackers with admin credentials can upload malicious PHP scripts to the web root directory, enabling remote code execution on the server.

    Published:Dec 19, 2025
    Last Modified:Apr 15, 2026
    EPS:Dec 19, 2025
    EPSS Score:0.00268
    CVSS Score:8.8

    Affected Products

    Vendor
    Flatnux
    Product
    Flatnux

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-1 Accessing Functionality Not Properly Constrained by ACLs

    Related CVEs

    CVE-2012-4892 (CVSS 4.3) — Multiple cross-site scripting (XSS) vulnerabilities in FlatnuX CMS 2012-03.08 and earlier allow remote attacke…
    CVE-2012-4890 (CVSS 4.3) — Multiple cross-site scripting (XSS) vulnerabilities in FlatnuX CMS 2011 08.09.2 and earlier allow remote attac…
    CVE-2012-4877 (CVSS 6.8) — Cross-site request forgery (CSRF) vulnerability in controlcenter.php in FlatnuX CMS 2011 08.09.2 and earlier a…
    CVE-2012-4878 (CVSS 5) — Absolute path traversal vulnerability in controlcenter.php in FlatnuX CMS 2011 08.09.2 allows remote administr…
    CVE-2009-0572 (CVSS 5.1) — PHP remote file inclusion vulnerability in include/flatnux.php in FlatnuX CMS (aka Flatnuke3) 2009-01-27 and 2…
    CVE-2008-5761 (CVSS 4.3) — Multiple cross-site scripting (XSS) vulnerabilities in FlatnuX CMS (aka Flatnuke3) 2008-12-11 allow remote att…
    CVE-2008-5759 (CVSS 4.3) — Cross-site scripting (XSS) vulnerability in FlatnuX CMS (aka Flatnuke3) 2008-12-11 allows remote attackers to …

    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