How severe is CVE-2023-23328?

CVE-2023-23328 has a CVSS 3.x base score of 8.8, rated high 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-2023-23328 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-23328?

CVE-2023-23328 affects Avantfax. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-23328?

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-2023-23328 published?

CVE-2023-23328 was published on 2023-03-10 and last updated on 2026-07-05.

CVE-2023-23328

CVE-2023-23328 is a high-severity vulnerability in Avantfax with a CVSS 3.x base score of 8.8. 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-434.

Key facts

Severity: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 1% (62nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Affected product: Avantfax
Published: 2023-03-10
Last modified: 2026-07-05

Description

A File Upload vulnerability exists in AvantFAX 3.3.7. An authenticated user can bypass PHP file type validation in FileUpload.php by uploading a specially crafted PHP file.

Frequently asked questions

What is CVE-2023-23328?: A File Upload vulnerability exists in AvantFAX 3.3.7. An authenticated user can bypass PHP file type validation in FileUpload.php by uploading a specially crafted PHP file.
How severe is CVE-2023-23328?: CVE-2023-23328 has a CVSS 3.x base score of 8.8, rated high 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-2023-23328 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-23328?: CVE-2023-23328 affects Avantfax. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-23328?: 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-2023-23328 published?: CVE-2023-23328 was published on 2023-03-10 and last updated on 2026-07-05.

References

Affected products (1)

cpe:2.3:a:avantfax:avantfax:3.3.7:*:*:*:*:*:*:*

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