Roundcube Webmail through 1.3.9 mishandles Punycode xn-- domain names, leading to homograph attacks.

The remote Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8223-1 advisory.

    It was discovered that Roundcube Webmail mishandled Punycode xn-- domain names. An attacker could possibly     use this issue to cause a homograph attack. (CVE-2019-15237)

    It was discovered that Roundcube Webmail did not properly sanitize certain attributes when handling CSS     within HTML messages and certain SVG attributes. An attacker could possibly use this issue to cause a     cross-site scripting attack. (CVE-2024-38356, CVE-2024-38357)

    It was discovered that Roundcube Webmail did not properly sanitize certain HTML attributes when rendering     e-mail messages. An attacker could possibly use this issue to cause a cross-site scripting attack.
    (CVE-2024-42008)

    It was discovered that Roundcube Webmail did not properly filter certain CSS token sequences within     rendered e-mail messages. An attacker could possibly use this issue to obtain sensitive information.
    (CVE-2024-42010)

    It was discovered that Roundcube Webmail did not properly treat an SVG tag as an image source within its     HTML sanitizer. An attacker could possibly use this issue to bypass remote image blocking to track email     open actions or potentially bypass access control. (CVE-2026-25916)

    It was discovered that Roundcube Webmail did not properly handle comments within Cascading Style Sheets     (CSS). An attacker could possibly use this issue to perform a CSS injection attack. (CVE-2026-26079)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

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

The remote host is affected by the vulnerability described in GLSA-202507-10 (Roundcube: Multiple Vulnerabilities)

    Multiple vulnerabilities have been discovered in Roundcube. Please review the CVE identifiers referenced     below for details.

Tenable has extracted the preceding description block directly from the Gentoo Linux security advisory.

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

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - Roundcube Webmail through 1.3.9 mishandles Punycode xn-- domain names, leading to homograph attacks.
    (CVE-2019-15237)

Note that Nessus relies on the presence of the package as reported by the vendor.

**Version 1.3.10**

  - Managesieve: Fix so 'Create filter' option does not show     up when Filters menu is disabled (#6723)

  - Enigma: Fix bug where revoked users/keys were not greyed     out in key info

  - Enigma: Fix error message when trying to encrypt with a     revoked key (#6607)

  - Enigma: Fix 'decryption oracle' bug [CVE-2019-10740]     (#6638)

  - Fix compatibility with kolab/net_ldap3 > 1.0.7 (#6785)

  - Fix bug where bmp images couldn't be displayed on some     systems (#6728)

  - Fix bug in parsing vCard data using PHP 7.3 due to an     invalid regexp (#6744)

  - Fix bug where bold/strong text was converted to     upper-case on html-to-text conversion (6758)

  - Fix bug in rcube_utils::parse_hosts() where %t, %d, %z     could return only tld (#6746)

  - Fix bug where Next/Prev button in mail view didn't work     with multi-folder search result (#6793)

  - Fix bug where selection of columns on messages list     wasn't working

  - Fix bug in converting multi-page Tiff images to Jpeg     (#6824)

  - Fix wrong messages order after returning to a     multi-folder search result (#6836)

  - Fix PHP 7.4 deprecation: implode() wrong parameter order     (#6866)

  - Fix bug where it was possible to bypass the     position:fixed CSS check in received messages (#6898)

  - Fix bug where some strict remote URIs in url() style     were unintentionally blocked (#6899)

  - Fix bug where it was possible to bypass the CSS jail in     HTML messages using :root pseudo-class (#6897)

  - Fix bug where it was possible to bypass href URI check     with data:application/xhtml+xml URIs (#6896)

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website.
Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	Name	Product	Family	Type	Severity
311109	Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS : Roundcube Webmail vulnerabilities (USN-8223-1)	Nessus	Ubuntu Local Security Checks	Local	medium
242561	GLSA-202507-10 : Roundcube: Multiple Vulnerabilities	Nessus	Gentoo Local Security Checks	Local	critical
222450	Linux Distros Unpatched Vulnerability : CVE-2019-15237	Nessus	Misc.	Local	high
128580	Fedora 29 : roundcubemail (2019-d9c2f1ec70)	Nessus	Fedora Local Security Checks	Local	high

Detections

Analytics

CVE-2019-15237

high

Tenable Plugins

medium

critical

high

high