CVE-2026-54433 | BDVDB-2026-348259 Detail

RoundcubeWebmail

Description#

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).

Impact#

Per CVSS v3.1: confidentiality impact low, integrity impact low, availability impact none. Attack vector: network.

Weaknesses#

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

References#

https://roundcube.net/news/2026/07/05/security-updates-1.6.17-and-1.7.2

Exploit#

No public exploit known

History#

Version 12026-07-14Record published in the CVE List.
Version 22026-07-15Most recent update recorded in the CVE List.

Published

Published: 2026-07-14
Last modified: 2026-07-15

Vendor information

Vendor: Roundcube
Product: Webmail

All Roundcube vulnerabilities

Score

7.2 High

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 31.6.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Cross-Site Scripting

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
>= 1.6.0 and < 1.6.17
Fixed
1.6.17
Vulnerable
>= 1.7.0 and < 1.7.2
Fixed
1.7.2

Scoring System

CVSS v4.0

Not available

CVSS v3.1

7.2 High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

Metric breakdown
Attack Vector	Network
Attack Complexity	Low
Privileges Required	None
User Interaction	None
Scope	Changed
Confidentiality	Low
Integrity	Low
Availability	None

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).