---
id: CVE-2026-54433
title: >-
  In Roundcube Webmail before 1.6.17 and 1.7.x before 1.7.2, there is Stored
  Cross-Site Scripting (XSS) via a crafted plain-text email message
summary: >-
  In Roundcube Webmail before 1.6.17 and 1.7.x before 1.7.2, there is Stored
  Cross-Site Scripting (XSS) via a crafted plain-text email message. The
  attacker-controlled JavaScript executes within the victim's authenticated
  session simply by…
severity: high
cvss: 7.2
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N'
cwe:
  - CWE-79
vendor: roundcube
product: webmail
affected:
  - webmail < 1.6.17
  - 'webmail >= 1.7.0, < 1.7.2'
patched:
  - webmail 1.7.2
published: '2026-07-14'
updated: '2026-07-17'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-54433'
references:
  - url: 'https://roundcube.net/news/2026/07/05/security-updates-1.6.17-and-1.7.2'
    label: cve@mitre.org
tags:
  - nvd
  - exploit-available
epss: 0.00311
epssPercentile: 0.21439
ingestedAt: '2026-07-17T20:15:42.892Z'
exploits:
  github: 1
  githubRepos:
    - 'https://github.com/aramosf/CVE-2026-54433'
  checkedAt: '2026-09-26T09:05:49.472Z'
exploitAvailable: true
---

## Overview

In Roundcube Webmail before 1.6.17 and 1.7.x before 1.7.2, there is Stored Cross-Site Scripting (XSS) via a crafted plain-text email message. The attacker-controlled JavaScript executes within the victim's authenticated session simply by opening or previewing the message (zero-click).

## Affected

- `webmail < 1.6.17`
- `webmail >= 1.7.0, < 1.7.2`

## Remediation

Upgrade past the affected range:

- `webmail 1.7.2`