---
id: CVE-2023-43901
title: >-
  Incorrect access control in the AdHoc User creation form of EMSigner v2.8.7
  allows unauthenticated attackers to arbitrarily modify usernames and
  privileges by using the email address of a registered user.
summary: >-
  Incorrect access control in the AdHoc User creation form of EMSigner v2.8.7
  allows unauthenticated attackers to arbitrarily modify usernames and
  privileges by using the email address of a registered user.
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N'
cwe:
  - CWE-284
vendor: emudhra
product: emsigner
affected:
  - emsigner = 2.8.7
published: '2023-11-14'
updated: '2026-08-27'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2023-43901'
references:
  - url: 'https://secpro.llc/EMSigner-CVE-1/'
    label: cve@mitre.org
  - url: 'https://secpro.llc/EMSigner-CVE-1/'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.00467
epssPercentile: 0.39657
ingestedAt: '2026-08-27T17:05:15.999Z'
---

## Overview

Incorrect access control in the AdHoc User creation form of EMSigner v2.8.7 allows unauthenticated attackers to arbitrarily modify usernames and privileges by using the email address of a registered user.

## Affected

- `emsigner = 2.8.7`

## Remediation

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