---
id: CVE-2021-31721
title: >-
  Chevereto before 3.17.1 allows Cross Site Scripting (XSS) via an image title
  at the image upload stage.
summary: >-
  Chevereto before 3.17.1 allows Cross Site Scripting (XSS) via an image title
  at the image upload stage.
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: chevereto
product: chevereto
affected:
  - chevereto < 3.17.1
patched:
  - chevereto 3.17.1
published: '2021-06-30'
updated: '2026-07-05'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2021-31721'
references:
  - url: >-
      http://packetstormsecurity.com/files/164183/Cloudron-6.2-Cross-Site-Scripting.html
    label: cve@mitre.org
  - url: 'https://www.exploit-db.com/exploits/49859'
    label: cve@mitre.org
  - url: 'http://chevereto.com'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      http://packetstormsecurity.com/files/164183/Cloudron-6.2-Cross-Site-Scripting.html
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://www.exploit-db.com/exploits/49859'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.00894
epssPercentile: 0.57801
ingestedAt: '2026-07-06T17:03:23.534Z'
---

## Overview

Chevereto before 3.17.1 allows Cross Site Scripting (XSS) via an image title at the image upload stage.

## Affected

- `chevereto < 3.17.1`

## Remediation

Upgrade past the affected range:

- `chevereto 3.17.1`