CVE-2026-61399 json
Apache CloudStack: Cross-Site Scripting (XSS) Vulnerability in Lock User Function in UI
published 2026-08-21 2 mo ago modified 2026-10-16 23 d ago also EUVD-2026-63838
- cvss
- 4.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 43%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- apache cloudstack 4.20.3.1, 4.22.1.1
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 2 mo ago
Exploit prediction
0.50% chance of exploitation in the next 30 days, higher than 43% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 4.8 | CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N |
| CNA | 3.1 | 4.8 | CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N |
Affected products
- Apache Software Foundation Apache CloudStack
Classification
- Weakness
-
- CWE-116 Improper Encoding or Escaping of Output
References
-
lists.apache.org
/thread/g6cwddtjrwbh1d56wjz4cfp3fzfm4kbc
vendor-advisory, mailing-list
Sources
- CVE List CVE-2026-61399
- NVD CVE-2026-61399
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.