CVE-2026-61398

Apache CloudStack: Cross-Site Scripting (XSS) Vulnerability in Instance Reset Password Function in UI

State: Published
Severity: 9.1 Critical
Published: Aug 21, 2026
Updated: Aug 25, 2026
Reserved: Jul 9, 2026

Description

Improper Encoding or Escaping of Output vulnerability in Apache CloudStack's UI while using Instance Reset Password functionality.

This issue affects Apache CloudStack: from 4.15.1.0 through 4.20.3.0 and from 4.21.0.0 through 4.22.1.0.

Users are recommended to upgrade to version 4.20.3.1 or 4.22.1.1 or later, which fixes the issue.

Scores

CVSS	Score	Vector	Source
3.1	9.1 Critical	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N	CISA-ADP

Weaknesses

CWE-116 Improper Encoding or Escaping of Output

Affected Products

Product	Versions
Apache CloudStackApache Software Foundation	4.15.1.0 through 4.20.3.0Affected 4.21.0.0 through 4.22.1.0Affected

References

https://lists.apache.org/thread/g6cwddtjrwbh1d56wjz4cfp3fzfm4kbcvendor-advisory

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