---
title: "CVE-2026-53953: GetSimple CMS - Authentication Bypass"
description: "GetSimple CMS CE 3.3.22 contains a broken authentication caused by predictable temporary password generation using PHP rand() seeded with microtime() in the password reset endpoint, letting attackers perform administrator account takeover, exploit requires no authentication but relies on timing attack."
url: https://panop.io/threat-heartbeat/CVE-2026-53953/
---

# CVE-2026-53953 GetSimple CMS - Authentication Bypass

GetSimple CMS CE 3.3.22 contains a broken authentication caused by predictable temporary password generation using PHP rand() seeded with microtime() in the password reset endpoint, letting attackers perform administrator account takeover, exploit requires no authentication but relies on timing attack.

CVSS base score 9.1 /10

Critical

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.34% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-53953)

## Details

Type

Authentication Bypass

Impact

Broken Authentication

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Published

1 October 2026

Updated

15 October 2026

Weakness

[CWE-338](https://cwe.mitre.org/data/definitions/338.html)

## Vendor fix

Update to the latest version when available or apply patches addressing password reset and rate limiting.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-53953](https://nvd.nist.gov/vuln/detail/CVE-2026-53953)
- [https://github.com/GetSimpleCMS-CE/GetSimpleCMS-CE/security/advisories/GHSA-vvhx-56q2-gcjq](https://github.com/GetSimpleCMS-CE/GetSimpleCMS-CE/security/advisories/GHSA-vvhx-56q2-gcjq)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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