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TI-2026-38921 Aliases CVE-2026-53953

GetSimple CMS: Predictable Password Reset Password Allows Administrator Account Takeover

Priority HIGH 80CWE-338Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-640.

Summary

GetSimple CMS is a content management system (CMS), and GetSimple CMS CE is the community edition of that CMS. In version 3.3.22, the password reset endpoint can be accessed without authentication. When a reset request is submitted for an existing user, the application generates a new temporary password and immediately stores its hash as the user's new password. The temporary password is generated using PHP rand() seeded with microtime(). Because this seed is time-based and has a limited effective search space, an attacker can generate possible reset password candidates. Since the admin login endpoint does not enforce rate limiting or account lockout, these candidates can be tested online until the correct password is found. Successful exploitation may lead to administrator account takeover. At time of publication, there are no publicly available patches.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00425 37th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
GetSimpleCMS-CEGetSimpleCMS-CE= 3.3.22—No fix listedCNA
  • GetSimpleCMS-CE VendorGetSimpleCMS-CE Affected = 3.3.22 Fixed in — No fix listed CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:getsimple-ce:getsimple_cms:*:*:*:*:*:*:*:*——GetSimpleCMS-CE
  • cpe:2.3:a:getsimple-ce:getsimple_cms:*:*:*:*:*:*:*:* Versions — — ·GetSimpleCMS-CE

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-53953
  2. 2026-10-06 CISA SSVC decision points changed
  3. 2026-10-06 Priority changed: LOW → HIGH

References

Other 1

  • TI-2024-36775 GetSimple CMS CE 3.3.19 suffers from arbitrary code execution in the template editing… CVSS 3.1CRITICAL 9.8
  • TI-2025-30771 GetSimple CMS RCE in Edit component CVSS 4.0HIGH 8.6
  • TI-2026-40846 GetSimple CMS: Missing CSRF protection in UpdateCE allows forging a privileged server-side update request CVSS 3.1CRITICAL 9.6
  • TI-2026-40844 GetSimple CMS: CSRF, SSRF, and Unrestricted Zip Extraction CVSS 3.1CRITICAL 9.1
  • TI-2024-36777 GetSimple CMS CE 3.3.19 is vulnerable to Server-Side Request Forgery (SSRF) in the backend plugin module. CVSS 3.1HIGH 8.8
  • TI-2026-50122 GetSimple CMS: Stored Cross-Site Scripting (XSS) via the "title" parameter in admin/components.php CVSS 4.0HIGH 8.7
See all 17 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences