---
id: CVE-2021-45834
title: >-
  An attacker can upload or transfer files of dangerous types to the OpenDocMan
  1.4.4 portal via add.php using MIME-bypass, which may be automatically
  processed within the product's environment or lead to arbitrary code
  execution.
summary: >-
  An attacker can upload or transfer files of dangerous types to the OpenDocMan
  1.4.4 portal via add.php using MIME-bypass, which may be automatically
  processed within the product's environment or lead to arbitrary code
  execution.
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-434
vendor: opendocman
product: opendocman
affected:
  - opendocman = 1.4.4
published: '2022-03-18'
updated: '2026-07-05'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2021-45834'
references:
  - url: 'https://github.com/opendocman/opendocman'
    label: cve@mitre.org
  - url: 'https://github.com/opendocman/opendocman/issues/326'
    label: cve@mitre.org
  - url: 'https://github.com/opendocman/opendocman/issues/330'
    label: cve@mitre.org
  - url: 'http://opendocman.com'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://github.com/opendocman/opendocman'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://github.com/opendocman/opendocman/issues/326'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://github.com/opendocman/opendocman/issues/330'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.02305
epssPercentile: 0.82608
ingestedAt: '2026-07-06T17:03:24.091Z'
---

## Overview

An attacker can upload or transfer files of dangerous types to the OpenDocMan 1.4.4 portal via add.php using MIME-bypass, which may be automatically processed within the product's environment or lead to arbitrary code execution.

## Affected

- `opendocman = 1.4.4`

## Remediation

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