Cross-site scripting in Johnson Controls Metasys 14
Priority LOW 29CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- Passive
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-79.
Summary
Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in Johnson Controls Metasys 14 and Johnson Controls Metasys 15 allows Cross Site Scripting. This issue affects Metasys 14: before 14.1.5; Metasys 15: before 15.0.1.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00396 34th percentileScored 2026-11-07
Fix Fixed Metasys 14 (Johnson Controls): 14.1.5Metasys 15 (Johnson Controls): 15.0.1
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Johnson Controls | Metasys 14 | before 14.1.5 | 14.1.5 | Patch available | CNA |
| Johnson Controls | Metasys 15 | before 15.0.1 | 15.0.1 | Patch available | CNA |
- Metasys 14 VendorJohnson Controls Affected before 14.1.5 Fixed in 14.1.5 Patch available CNA
- Metasys 15 VendorJohnson Controls Affected before 15.0.1 Fixed in 15.0.1 Patch available CNA
Remediation
- Fix · CNA Metasys 14 (Johnson Controls) Fixed in 14.1.5
- Fix · CNA Metasys 15 (Johnson Controls) Fixed in 15.0.1
Timeline
- 2026-10-02 Threatist record created from CVE-2026-34491
- 2026-10-03 Alias added: GHSA-2fj7-6j2c-3972
More Johnson Controls vulnerabilities
- TI-2025-19346 Metasys product command injection vulnerability could allow remote SQL execution CVSS 4.0CRITICAL 9.5
- TI-2023-01901 Improper Authentication for OpenBlue Enterprise Manager Data Collector CVSS 3.1CRITICAL 10.0
- TI-2023-04421 An unauthorized user could access debug features in Quantum HD Unity products that were… CVSS 3.1CRITICAL 10.0
- TI-2026-17437 Johnson Controls -Frick Quantum HD- Unauthenticated Remote Code Execution CVSS 4.0HIGH 8.8
- TI-2025-19344 Johnson Controls Software House iSTAR Configuration Utility (ICU) Tool CVSS 4.0CRITICAL 9.3
- TI-2023-03311 Missing brute-force protection in Johnson Controls IQ Wifi 6 CVSS 3.1CRITICAL 9.8
Sources
- CVE-2026-34491 · CVE Program
- CVE-2026-34491 · NVD
- FIRST EPSS
- GHSA-2fj7-6j2c-3972 · GitHub Advisory Database · CC BY 4.0
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