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Fencer Vulns
high 7.1

CVE-2020-9049 json

victor Web Client and C•CURE Web Client JSON Web Token (JWT) Vulnerability

published 2020-11-19 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-29878

cvss
7.1
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 45%
public exploits
0
none known

Summary

A vulnerability in specified versions of American Dynamics victor Web Client and Software House C•CURE Web Client could allow an unauthenticated attacker on the network to create and sign their own JSON Web Token and use it to execute an HTTP API Method without the need for valid authentication/authorization. Under certain circumstances, this could be used by an attacker to impact system availability by conducting a Denial of Service attack.

Patch / fix

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-20-324-01 updated cvss 7.1

Johnson Controls Sensormatic Electronics American Dynamics victor Web Client

  • Sensormatic Electronics, LLC, Johnson Controls Inc. American Dynamics victor Web Client, Software House C•CURE Web Client < 2.90
    affected: mitigation “Johnson Controls advises users to maintain product installations at the latest release and provides several options for remediation of this issue. See below for details.” americandynamics.net

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

Exploit prediction

0.53% chance of exploitation in the next 30 days, higher than 45% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.1 CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
NVD 3.1 5.3 CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.7 AV:A/AC:M/Au:N/C:N/I:N/A:C

Affected products

  • Johnson Controls victor Web Client version 5.6 and prior
  • Johnson Controls C•CURE Web Client version 2.90 and prior (Note - This does not affect the new web-based C•CURE 9000 client that was introduced in C•CURE 9000 v2.90)

Classification

Weakness

References

Sources

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.