CVE-2026-88418 (GCVE-0-2026-88418)

Vulnerability from cvelistv5 – Published: 2026-09-22 00:00 – Updated: 2026-09-25 23:25
VLAI
Summary
CMSimple 5.24 ships with CSRF protection disabled by default, which turns csrfProtection() into a no-op on every state-changing admin request, and it does not send the csrf_token hidden field in admin forms. Because administrator authentication is cookie-only and no CSRF token is enforced, an unauthenticated attacker can induce a logged-in administrator's browser to issue a forged content-save request with a text payload containing a scripting marker. The marker is stored verbatim into content/content.php; on every subsequent page view evaluate_cmsimple_scripting() (functions.php) executes the marker body with PHP eval() — for all visitors, including unauthenticated ones. This yields persistent remote code execution on the web server.
Severity
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
SSVC
Exploitation: poc Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-25 23:23 UTC
CWE
  • n/a
  • CWE-352 - Cross-Site Request Forgery (CSRF)
Assigner
mitre CNA under the mitre root
CNA scorecard E 28/100 over 2338 records in the last 180 days details
References
Show details on NVD website
To clipboard 

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