How severe is CVE-2023-0509?

CVE-2023-0509 has a CVSS 3.x base score of 7.4, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2023-0509 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-0509?

CVE-2023-0509 primarily affects Pyload. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-0509?

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-2023-0509 published?

CVE-2023-0509 was published on 2023-01-26 and last updated on 2026-06-17.

CVE-2023-0509

CVE-2023-0509 is a high-severity vulnerability in Pyload with a CVSS 3.x base score of 7.4. 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-295.

Key facts

Severity: High (CVSS 3.x base score 7.4)
EPSS exploit prediction: 1% (41st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-295
Affected product: Pyload
Published: 2023-01-26
Last modified: 2026-06-17

Description

Improper Certificate Validation in GitHub repository pyload/pyload prior to 0.5.0b3.dev44.

Frequently asked questions

What is CVE-2023-0509?: Improper Certificate Validation in GitHub repository pyload/pyload prior to 0.5.0b3.dev44.
How severe is CVE-2023-0509?: CVE-2023-0509 has a CVSS 3.x base score of 7.4, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2023-0509 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-0509?: CVE-2023-0509 primarily affects Pyload. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-0509?: 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-2023-0509 published?: CVE-2023-0509 was published on 2023-01-26 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:pyload:pyload:*:*:*:*:*:*:*:*
cpe:2.3:a:pyload-ng_project:pyload-ng:*:*:*:*:*:python:*:*

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