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  4. CVE 2026 53952 getsimple cms getsimplecms ce have an
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Back to active CVEs
Critical · CVSS 9.8CVE-2026-53952

GetSimple CMS & GetSimpleCMS-CE have an Unauthenticated Admin Account Creation via Setup Logic FlawCVE-2026-53952

Answer in brief

CVE-2026-53952 records a Critical severity (CVSS 9.8) vulnerability in GetSimple CMS & GetSimpleCMS-CE have an Unauthenticated Admin Account Creation via Setup Logic Flaw. The current sources do not mark it as known exploited. The current feed maps GetSimpleCMS/GetSimpleCMS (generic), GetSimpleCMS-CE/GetSimpleCMS-CE (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 11, 2026Updated Sep 30, 2026Source checked Oct 27, 2026First seen by HOL Sep 11, 2026Material review Sep 30, 2026
Upstream Advisory

Key facts

Risk
Critical · CVSS 9.8
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 9.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps GetSimpleCMS/GetSimpleCMS (generic), GetSimpleCMS-CE/GetSimpleCMS-CE (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
GetSimpleCMS/GetSimpleCMSgeneric<=3.4.0a= 3.4.0a
GetSimpleCMS-CE/GetSimpleCMS-CEgeneric<=3.3.22= 3.3.22

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for GetSimpleCMS/GetSimpleCMS, GetSimpleCMS-CE/GetSimpleCMS-CE.
  2. 2Review the reported fix. Update GetSimpleCMS/GetSimpleCMS to = 3.4.0a; GetSimpleCMS-CE/GetSimpleCMS-CE to = 3.3.22 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Sep 11, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Sep 30, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Sep 11, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
Upstream source description

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.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • SourceCodester Online Food Ordering System delete_admin.php missing authenticationAlso CWE-306
  • OpenPanel before 3.0.0 Missing Authentication on Worker Bull BoardAlso CWE-306

Record context

Vulnerability class
Privilege Escalation
EPSS
Not reported
CWE IDs
CWE-285, CWE-306, CWE-489
Source
CVE List V5
Source checked
Oct 27, 2026
References
1 linked source
Open source record