How severe is CVE-2023-30300?

CVE-2023-30300 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2023-30300 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-30300?

CVE-2023-30300 affects W3 Webassembly. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-30300?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2023-30300 published?

CVE-2023-30300 was published on 2023-05-03 and last updated on 2026-06-17.

CVE-2023-30300

CVE-2023-30300 is a medium-severity vulnerability in W3 Webassembly with a CVSS 3.x base score of 5.5. 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-835.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
EPSS exploit prediction: 0% (20th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-835
Affected product: W3 Webassembly
Published: 2023-05-03
Last modified: 2026-06-17

Description

An issue in the component hang.wasm of WebAssembly 1.0 causes an infinite loop.

Frequently asked questions

What is CVE-2023-30300?: An issue in the component hang.wasm of WebAssembly 1.0 causes an infinite loop.
How severe is CVE-2023-30300?: CVE-2023-30300 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2023-30300 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-30300?: CVE-2023-30300 affects W3 Webassembly. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-30300?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-30300 published?: CVE-2023-30300 was published on 2023-05-03 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:w3:webassembly:1.0:*:*:*:*:*:*:*

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