Johnson Controls Metasys prior 14.1.5/15.0.1 cross site scripting

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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3.4$0-$5k0.00+

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Johnson Controls Metasys. Impacted is an unknown function. Performing a manipulation results in cross site scripting. This vulnerability was named CVE-2026-34491. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability was found in Johnson Controls Metasys. It has been classified as problematic. This affects an unknown functionality. The manipulation with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. This is going to have an impact on integrity. The summary by CVE is:

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.

The advisory is shared at johnsoncontrols.com. This vulnerability is uniquely identified as CVE-2026-34491 since 03/30/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

Upgrading to version 14.1.5 or 15.0.1 eliminates this vulnerability.

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

Name

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 3.5
VulDB Meta Temp Score: 3.4

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Cross site scripting
CWE: CWE-79 / CWE-94 / CWE-74
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Metasys 14.1.5/15.0.1

Timelineinfo

03/30/2026 CVE reserved
08/24/2026 +147 days Advisory disclosed
08/24/2026 +0 days VulDB entry created
08/24/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: johnsoncontrols.com
Status: Confirmed

CVE: CVE-2026-34491 (🔒)
GCVE (CVE): GCVE-0-2026-34491
GCVE (VulDB): GCVE-100-394773

Entryinfo

Created: 08/24/2026 19:59
Changes: 08/24/2026 19:59 (65)
Complete: 🔍
Cache ID: 216::103

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