How severe is CVE-2023-39477?

CVE-2023-39477 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2023-39477 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-39477?

CVE-2023-39477 affects Inductiveautomation Ignition. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-39477?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2023-39477 have an EU (EUVD) identifier?

Yes. CVE-2023-39477 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-43200.

When was CVE-2023-39477 published?

CVE-2023-39477 was published on 2024-05-03 and last updated on 2026-06-17.

CVE-2023-39477

CVE-2023-39477 is a high-severity vulnerability in Inductiveautomation Ignition with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-400.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (69th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-43200
Weakness: CWE-400
Affected product: Inductiveautomation Ignition
Published: 2024-05-03
Last modified: 2026-06-17

Description

Inductive Automation Ignition ConditionRefresh Resource Exhaustion Denial-of-Service Vulnerability. This vulnerability allows remote attackers to create a denial-of-service condition on affected installations of Inductive Automation Ignition. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of OPC UA ConditionRefresh requests. By sending a large number of requests, an attacker can consume all available resources on the server. An attacker can leverage this vulnerability to create a denial-of-service condition on the system. Was ZDI-CAN-20499.

Frequently asked questions

What is CVE-2023-39477?: Inductive Automation Ignition ConditionRefresh Resource Exhaustion Denial-of-Service Vulnerability. This vulnerability allows remote attackers to create a denial-of-service condition on affected installations of Inductive Automation Ignition. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of OPC UA ConditionRefresh requests. By sending a large number of requests, an attacker can consume all available resources on the server. An attacker can leverage this vulnerability to create a denial-of-service condition on the system. Was ZDI-CAN-20499.
How severe is CVE-2023-39477?: CVE-2023-39477 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2023-39477 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-39477?: CVE-2023-39477 affects Inductiveautomation Ignition. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-39477?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2023-39477 have an EU (EUVD) identifier?: Yes. CVE-2023-39477 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-43200.
When was CVE-2023-39477 published?: CVE-2023-39477 was published on 2024-05-03 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:inductiveautomation:ignition:*:*:*:*:*:*:*:*

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