---
id: CVE-2023-27172
title: Xpand IT Write-back Manager v2.3.1 uses weak secret keys to sign JWT tokens
summary: >-
  Xpand IT Write-back Manager v2.3.1 uses weak secret keys to sign JWT tokens.
  This allows attackers to easily obtain the secret key used to sign JWT tokens
  via a bruteforce attack.
severity: critical
cvss: 9.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N'
cwe:
  - CWE-307
vendor: xpand-it
product: write-back_manager
affected:
  - write-back_manager = 2.3.1
published: '2023-12-20'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T20:17:20.303'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2023-27172'
references:
  - url: 'https://balwurk.github.io/CVE-2023-27172/'
    label: cve@mitre.org
  - url: 'https://ghostline.neocities.org/CVE-2023-27172/'
    label: cve@mitre.org
  - url: 'https://balwurk.github.io/CVE-2023-27172/'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: total
  timestamp: '2025-05-06T18:48:13.127207Z'
epss: 0.00687
epssPercentile: 0.50563
ingestedAt: '2026-09-16T21:05:36.829Z'
---

## Overview

Xpand IT Write-back Manager v2.3.1 uses weak secret keys to sign JWT tokens. This allows attackers to easily obtain the secret key used to sign JWT tokens via a bruteforce attack.

## Affected

- `write-back_manager = 2.3.1`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.