Medium severity · published Aug 9, 2023
CVE-2023-23903
DoS via SAML configuration in Guardian/CMC before 22.6.2
4.9
CVSS
0.6%
EPSS
No
On KEV
Description
An authenticated administrator can upload a SAML configuration file with the wrong format, with the application not checking the correct file format. Every subsequent application request will return an error.
The whole application in rendered unusable until a console intervention.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 49% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CM
CMC · Nozomi Networks
before 22.6.2 · source: vendor, NVD
GU
Guardian · Nozomi Networks
before 22.6.2 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-23903
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-23903
Vendor Advisory
https://security.nozominetworks.com/NN-2023:7-01
More from CMC
8.9
CVE-2025-40899
Stored Cross-Site Scripting (XSS) in Assets and Nodes in Guardian/CMC before 26.0.0
8.9
CVE-2025-40892
Stored Cross-Site Scripting (XSS) in Reports in Guardian/CMC before 25.5.0
8.8
CVE-2025-40886
Authenticated SQL Injection on Alert functionality in Guardian/CMC before 25.2.0
8.8
CVE-2023-2567
Authenticated SQL Injection on Query functionality in Guardian/CMC before 22.6.3 and 23.1.0
8.8
CVE-2023-23574
Authenticated Blind SQL Injection on alerts count in Guardian/CMC before 22.6.2