CVE-2026-54432 — MEDIUM (4.7)

Vulnerability Description

Roundcube Webmail before 1.6.17 and 1.7.x before 1.7.2 allows Stored Cross-Site Scripting (XSS). The issue occurs because the attachment MIME type is not properly escaped on the attachment-validation warning page.

CVSS Score

4.7

MEDIUM

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

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality

LOW

Integrity

LOW

Availability

NONE

Related Weaknesses (CWE)

CWE-79

References

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

FAQ

What is CVE-2026-54432?

CVE-2026-54432 is a vulnerability with a CVSS score of 4.7 (MEDIUM). Roundcube Webmail before 1.6.17 and 1.7.x before 1.7.2 allows Stored Cross-Site Scripting (XSS). The issue occurs because the attachment MIME type is not properly escaped on the attachment-validation ...

How severe is CVE-2026-54432?

CVE-2026-54432 has been rated MEDIUM with a CVSS base score of 4.7/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-54432?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.