How severe is CVE-2023-5183?

CVE-2023-5183 has a CVSS 3.x base score of 9.9, rated critical severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-5183 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-5183?

CVE-2023-5183 affects Illumio Core Policy Compute Engine. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-5183?

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

When was CVE-2023-5183 published?

CVE-2023-5183 was published on 2023-09-27 and last updated on 2026-06-17.

CVE-2023-5183

CVE-2023-5183 is a critical-severity vulnerability in Illumio Core Policy Compute Engine with a CVSS 3.x base score of 9.9. 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-502.

Key facts

Severity: Critical (CVSS 3.x base score 9.9)
EPSS exploit prediction: 2% (72nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-502
Affected product: Illumio Core Policy Compute Engine
Published: 2023-09-27
Last modified: 2026-06-17

Description

Unsafe deserialization of untrusted JSON allows execution of arbitrary code on affected releases of the Illumio PCE. Authentication to the API is required to exploit this vulnerability. The flaw exists within the network_traffic API endpoint. An attacker can leverage this vulnerability to execute code in the context of the PCE’s operating system user.

Frequently asked questions

What is CVE-2023-5183?: Unsafe deserialization of untrusted JSON allows execution of arbitrary code on affected releases of the Illumio PCE. Authentication to the API is required to exploit this vulnerability. The flaw exists within the network_traffic API endpoint. An attacker can leverage this vulnerability to execute code in the context of the PCE’s operating system user.
How severe is CVE-2023-5183?: CVE-2023-5183 has a CVSS 3.x base score of 9.9, rated critical severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-5183 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-5183?: CVE-2023-5183 affects Illumio Core Policy Compute Engine. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-5183?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2023-5183 published?: CVE-2023-5183 was published on 2023-09-27 and last updated on 2026-06-17.

References

https://docs.illumio.com/Guides/security-advisories/september-2023/cve-2023-5183.htm

Affected products (1)

cpe:2.3:a:illumio:core_policy_compute_engine:*:*:*:*:*:*:*:*

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