Cross-site scripting in Apache CloudStack - CVE-2026-61399
Published: August 24, 2026
Vulnerability identifier: #VU144654
CSH Severity: Medium
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]
CVE-ID: CVE-2026-61399
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary script in the victim's browser.
The vulnerability exists due to cross-site scripting in the UI lock user functionality when rendering insufficiently escaped output. A remote attacker can inject crafted content to execute arbitrary script in the victim's browser.
Affected software
Apache CloudStack
How to mitigate CVE-2026-61399
Install security update from vendor's website.
Apache CloudStack - addressed in versions 4.20.3.1, 4.22.1.1