CVE-2020-9049victor Web Client and C•CURE Web Client JSON Web Token (JWT) Vulnerability
- 7.1HighCVSS base score
- 0.53%Exploitation in 30 daysEPSS · top 54% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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.
Timeline
ID reserved
By jci
- 9 months later
· 9 months later
Published
- 4 years later
· 4 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| jciCNA (assigner) | 3.1 | High7.1 | CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L |
| NVDNVD · Modified | 3.1 | Medium5.3 | CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.53% · top 54% of all CVEs (13 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.1.
Affected products
Johnson Controls · victor Web Client version 5.6 and prior
- affected unspecified – ≤ 5.6
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)
- affected unspecified – ≤ 2.90
What to do
Solution: victor Web Client • victor Web Client v5.6 and earlier – upgrade to v5.6 SP1 (victor Unified Client v5.6 SP1) Registered users can obtain the software update by downloading the update found here: https://www.americandynamics.net/support/SoftwareDownloads.aspx. C•CURE Web Client C•CURE Web v2.60 and earlier - upgrade to a minimum of v2.70 and install the relevant update below. • C•CURE Web v2.70 - install the update WebClient_c2.70_5.2_Update02 • C•CURE Web v2.80 - install the update WebClient_c2.80_v5.4.1_Update04 • C•CURE Web v2.90 - install the update CCureWeb_2.90_Update01 Registered users can obtain the software update by downloading the update found here: https://swhouse.com/Support/SoftwareDownloads.aspx.
References
References2
- https://www.johnsoncontrols.com/cyber-solutions/security-advisories (opens in a new tab)x_refsource_CONFIRMx_transferred
- ICS-CERT Advisory (opens in a new tab)third-party-advisoryx_refsource_CERTx_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2020-29878 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2020-9049)Record last updated .