---
id: CVE-2021-43677
title: Fluxbb v1.4.12 is affected by a Cross Site Scripting (XSS) vulnerability.
summary: Fluxbb v1.4.12 is affected by a Cross Site Scripting (XSS) vulnerability.
severity: medium
cvss: 6.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'
cwe:
  - CWE-79
vendor: fluxbb
product: fluxbb
affected:
  - fluxbb = 1.4.12
published: '2022-01-04'
updated: '2026-07-05'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2021-43677'
references:
  - url: 'https://github.com/fluxbb/fluxbb'
    label: cve@mitre.org
  - url: 'http://fluxbb.com'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://github.com/fluxbb/fluxbb'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.00621
epssPercentile: 0.47448
ingestedAt: '2026-07-06T17:03:23.819Z'
---

## Overview

Fluxbb v1.4.12 is affected by a Cross Site Scripting (XSS) vulnerability.

## Affected

- `fluxbb = 1.4.12`

## Remediation

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