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    CVE-2026-53952

    GetSimple CMS is a content management system (CMS), and GetSimple CMS CE is the community edition of that CMS. A logic flaw in GetSimple CMS (v3.4.0a and below) and GetSimpleCMS-CE (v3.3.22 and below) allows unauthenticated attackers to create a new administrator account. The application features an automated security control designed to delete the sensitive `admin/setup.php` file post-installation. However, this control is neutralized by a self-exclusion bug within the deletion logic, leaving the setup script accessible for unauthorized account creation even after a legitimate installation is completed. As of time of publication, no known patched versions are available.

    Published:Sep 11, 2026
    Last Modified:Sep 14, 2026
    EPS:Sep 11, 2026
    EPSS Score:0.00325
    CVSS Score:9.8

    Affected Products

    Vendor
    Get-simple
    Product
    Getsimplecms
    Vendor
    Getsimple-ce
    Product
    Getsimple Cms

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-1 Accessing Functionality Not Properly Constrained by ACLs
    CAPEC-104 Cross Zone Scripting
    CAPEC-12 Choosing Message Identifier
    CAPEC-121 Exploit Non-Production Interfaces
    CAPEC-127 Directory Indexing
    CAPEC-13 Subverting Environment Variable Values
    CAPEC-166 Force the System to Reset Values
    CAPEC-17 Using Malicious Files
    CAPEC-216 Communication Channel Manipulation
    CAPEC-36 Using Unpublished Interfaces or Functionality
    CAPEC-39 Manipulating Opaque Client-based Data Tokens
    CAPEC-402 Bypassing ATA Password Security
    CAPEC-45 Buffer Overflow via Symbolic Links
    CAPEC-5 Blue Boxing
    CAPEC-51 Poison Web Service Registry
    CAPEC-59 Session Credential Falsification through Prediction
    CAPEC-60 Reusing Session IDs (aka Session Replay)
    CAPEC-62 Cross Site Request Forgery
    CAPEC-647 Collect Data from Registries
    CAPEC-661 Root/Jailbreak Detection Evasion via Debugging
    CAPEC-668 Key Negotiation of Bluetooth Attack (KNOB)
    CAPEC-76 Manipulating Web Input to File System Calls
    CAPEC-77 Manipulating User-Controlled Variables
    CAPEC-87 Forceful Browsing

    Related CVEs

    CVE-2026-26351 (CVSS 4.8) — GetSimpleCMS Community Edition (CE) versions prior to 3.3.22 (3.3.16 tested) contains a stored cross-site scri…
    CVE-2021-47870 (CVSS 4.8) — GetSimple CMS My SMTP Contact Plugin 1.1.2 suffers from a Stored Cross-Site Scripting (XSS) vulnerability. The…
    CVE-2021-47860 (CVSS 8.5) — GetSimple CMS Custom JS 0.1 plugin contains a cross-site request forgery vulnerability that allows unauthentic…
    CVE-2021-47778 (CVSS 8.6) — GetSimple CMS My SMTP Contact Plugin 1.1.2 contains a PHP code injection vulnerability. An authenticated admin…
    CVE-2021-47830 (CVSS 5.1) — GetSimple CMS My SMTP Contact Plugin 1.1.1 contains a cross-site request forgery (CSRF) vulnerability. Attacke…
    CVE-2013-10032 (CVSS 8.7) — An authenticated remote code execution vulnerability exists in GetSimpleCMS version 3.2.1. The application’s u…
    CVE-2024-11125 (CVSS 6.9) — A vulnerability was found in GetSimpleCMS 3.3.16 and classified as problematic. This issue affects some unknow…
    CVE-2023-51246 (CVSS 5.4) — A Cross Site Scripting (XSS) vulnerability in GetSimple CMS 3.3.16 exists when using Source Code Mode as a bac…
    CVE-2023-6188 (CVSS 4.7) — A vulnerability was found in GetSimpleCMS 3.3.16/3.4.0a. It has been rated as critical. This issue affects som…
    CVE-2023-46040 (CVSS 5.4) — Cross Site Scripting vulnerability in GetSimpleCMS v.3.4.0a allows a remote attacker to execute arbitrary code…

    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