Detections
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Roundcube Webmail 1.5.x < 1.5.13 / 1.6.x < 1.6.13 Multiple Vulnerabilities

medium Nessus Plugin ID 298770

Synopsis

An application running on the remote web server is affected by multiple vulnerabilities.

Description

The remote web server is running Roundcube Webmail version 1.5.x prior to 1.5.13 or 1.6.x prior to 1.6.13. It is, therefore, affected by multiple vulnerabilities:

 - A Cascading Style Sheets (CSS) injection vulnerability exists due to mishandling of comments. A remote attacker could exploit this to inject arbitrary CSS. (CVE-2026-26079)

 - A remote image blocking bypass exists because SVG feImage elements are not blocked when the 'Block remote images' setting is used. A remote attacker could exploit this to load remote images. (CVE-2026-25916)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Upgrade to Roundcube Webmail version 1.5.13, 1.6.13 or later.

See Also

http://www.nessus.org/u?6b545fdc

Plugin Details

Severity: Medium

ID: 298770

File Name: roundcube_webmail_1_6_13.nasl

Version: 1.1

Type: remote

Family: CGI abuses

Published: 2/12/2026

Updated: 2/12/2026

Supported Sensors: Nessus

Enable CGI Scanning: true

Risk Information

VPR

Risk Factor: Low

Score: 2.4

CVSS v2

Risk Factor: Medium

Base Score: 5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N

CVSS Score Source: CVE-2026-26079

CVSS v3

Risk Factor: Medium

Base Score: 4.7

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N

Vulnerability Information

CPE: cpe:/a:roundcube:webmail

Required KB Items: installed_sw/Roundcube Webmail

Patch Publication Date: 2/8/2026

Vulnerability Publication Date: 2/8/2026

Reference Information

CVE: CVE-2026-25916, CVE-2026-26079