How severe is CVE-2023-28128?

CVE-2023-28128 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-28128 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 85% (100th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-28128?

CVE-2023-28128 affects Ivanti Avalanche. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-28128?

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.

When was CVE-2023-28128 published?

CVE-2023-28128 was published on 2023-05-09 and last updated on 2026-06-17.

CVE-2023-28128

CVE-2023-28128 is a high-severity vulnerability in Ivanti Avalanche with a CVSS 3.x base score of 7.2. Its EPSS exploit-prediction score of 85% places it in the 100th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-434.

Key facts

Severity: High (CVSS 3.x base score 7.2)
EPSS exploit prediction: 85% (100th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Affected product: Ivanti Avalanche
Published: 2023-05-09
Last modified: 2026-06-17

Description

An unrestricted upload of file with dangerous type vulnerability exists in Avalanche versions 6.3.x and below that could allow an attacker to achieve a remove code execution.

Frequently asked questions

What is CVE-2023-28128?: An unrestricted upload of file with dangerous type vulnerability exists in Avalanche versions 6.3.x and below that could allow an attacker to achieve a remove code execution.
How severe is CVE-2023-28128?: CVE-2023-28128 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-28128 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 85% (100th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-28128?: CVE-2023-28128 affects Ivanti Avalanche. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-28128?: 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.
When was CVE-2023-28128 published?: CVE-2023-28128 was published on 2023-05-09 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:ivanti:avalanche:*:*:*:*:*:*:*:*

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