Roundcube Webmail up to 1.6.17/1.7.2 SVG Image cross site scripting

Summaryinfo

A vulnerability identified as problematic has been detected in Roundcube Webmail up to 1.6.17/1.7.2. This affects an unknown function of the component SVG Image Handler. This manipulation causes cross site scripting. This vulnerability is tracked as CVE-2026-75003. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability classified as problematic was found in Roundcube Webmail up to 1.6.17/1.7.2. Affected by this vulnerability is some unknown functionality of the component SVG Image Handler. The manipulation with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. As an impact it is known to affect integrity. The summary by CVE is:

In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, an unclosed url() in a FuncIRI attribute of an SVG image could evade the remote image blocking, which may lead to information disclosure or privilege escalation.

It is possible to read the advisory at roundcube.net. This vulnerability is known as CVE-2026-75003 since 08/17/2026. The exploitation appears to be easy. The attack can be launched remotely. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

Upgrading to version 1.6.18 or 1.7.3 eliminates this vulnerability.

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Productinfo

Type

• Mail Client Software

Vendor

• Roundcube

Name

• Webmail

Version

• 1.6.0
• 1.6.1
• 1.6.2
• 1.6.3
• 1.6.4
• 1.6.5
• 1.6.6
• 1.6.7
• 1.6.8
• 1.6.9
• 1.6.10
• 1.6.11
• 1.6.12
• 1.6.13
• 1.6.14
• 1.6.15
• 1.6.16
• 1.6.17
• 1.7.0
• 1.7.1
• 1.7.2

License

• free

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

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CVSSv2info

Exploitinginfo

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Entryinfo

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