anonhaven

CVE-2026-61399

MEDIUM CVSS 3.1: 4.8 EPSS 0.28%
Updated Aug 27, 2026
Apache
Parameter Value
CVSS 4.8 (MEDIUM)
Affected Versions 4.20.0.0 — 4.22.1.1
Fixed In 4.20.3.1
Type CWE-116 (Improper Encoding or Escaping of Output)
Vendor Apache
Public PoC No

Improper Encoding or Escaping of Output vulnerability in Apache CloudStack's UI while using Lock User Functionality. This issue affects Apache CloudStack: from 4.20.0.0 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.

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
High
Admin privileges needed
User Interaction
Required
User action required

Impact Assessment

Confidentiality
Low
Partial data leak
Integrity
Low
Partial data modification
Availability
None
No disruption

CVSS Vector v3.1

Weakness Type (CWE)

CWE-116 Improper Encoding or Escaping of Output

Vulnerable Products 2

Configuration From (including) Up to (excluding)
Apache Cloudstack
cpe:2.3:a:apache:cloudstack:*:*:*:*:*:*:*:*
 4.20.0.0 4.20.3.1
Apache Cloudstack
cpe:2.3:a:apache:cloudstack:*:*:*:*:*:*:*:*
 4.21.0.0 4.22.1.1

References 1

https://lists.apache.org/thread/g6cwddtjrwbh1d56wjz4cfp3fzfm4kbc
security@apache.org
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