---
id: CVE-2020-26679
title: vFairs 3.3 is affected by Insecure Permissions
summary: >-
  vFairs 3.3 is affected by Insecure Permissions. Any user logged in to a vFairs
  virtual conference or event can modify any other users profile information or
  profile picture. After receiving any user's unique identification number and
  the…
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N'
cwe:
  - CWE-639
vendor: vfairs
product: vfairs
affected:
  - vfairs = 3.3
published: '2021-05-26'
updated: '2026-07-05'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2020-26679'
references:
  - url: 'https://api.vfairs.com/v1/profiles'
    label: cve@mitre.org
  - url: 'https://api.vfairs.com/v1/profiles?access_key='
    label: cve@mitre.org
  - url: >-
      https://www.huntress.com/blog/zero-day-vulnerabilities-in-popular-event-management-platforms-could-leave-msps-open-to-attack
    label: cve@mitre.org
  - url: 'http://vfairs.com'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://api.vfairs.com/v1/profiles'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://api.vfairs.com/v1/profiles?access_key='
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://www.huntress.com/blog/zero-day-vulnerabilities-in-popular-event-management-platforms-could-leave-msps-open-to-attack
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.00773
epssPercentile: 0.53746
ingestedAt: '2026-07-05T00:59:26.433Z'
---

## Overview

vFairs 3.3 is affected by Insecure Permissions. Any user logged in to a vFairs virtual conference or event can modify any other users profile information or profile picture. After receiving any user's unique identification number and their own, an HTTP POST request can be made update their profile description or supply a new profile image. This can lead to potential cross-site scripting attacks on any user, or upload malicious PHP webshells as "profile pictures." The user IDs can be easily determined by other responses from the API for an event or chat room.

## Affected

- `vfairs = 3.3`

## Remediation

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