How severe is CVE-2021-46331?

CVE-2021-46331 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-2021-46331 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-46331?

CVE-2021-46331 affects Moddable Moddable Sdk. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-46331?

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

When was CVE-2021-46331 published?

CVE-2021-46331 was published on 2022-01-20 and last updated on 2026-06-17.

CVE-2021-46331

CVE-2021-46331 is a medium-severity vulnerability in Moddable Moddable Sdk 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.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 4.3
EPSS exploit prediction: 1% (49th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Moddable Moddable Sdk
Published: 2022-01-20
Last modified: 2026-06-17

Description

Moddable SDK v11.5.0 was discovered to contain a SEGV vulnerability via xs/sources/xsProxy.c in fxProxyGetPrototype.

Frequently asked questions

What is CVE-2021-46331?: Moddable SDK v11.5.0 was discovered to contain a SEGV vulnerability via xs/sources/xsProxy.c in fxProxyGetPrototype.
How severe is CVE-2021-46331?: CVE-2021-46331 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-2021-46331 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-46331?: CVE-2021-46331 affects Moddable Moddable Sdk. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-46331?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-46331 published?: CVE-2021-46331 was published on 2022-01-20 and last updated on 2026-06-17.

References

https://github.com/Moddable-OpenSource/moddable/issues/750

Affected products (1)

cpe:2.3:a:moddable:moddable_sdk:11.5.0:*:*:*:*:*:*:*

More vulnerabilities in Moddable Moddable Sdk

CVE-2021-46334 — High (CVSS 7.8): Moddable SDK v11.5.0 was discovered to contain a stack buffer overflow via the component __interceptor_strcat.
CVE-2021-46332 — High (CVSS 7.8): Moddable SDK v11.5.0 was discovered to contain a heap-buffer-overflow via xs/sources/xsDataView.c in fxUint8Getter.
CVE-2021-46328 — High (CVSS 7.8): Moddable SDK v11.5.0 was discovered to contain a heap-buffer-overflow via the component __libc_start_main.
CVE-2021-46326 — High (CVSS 7.8): Moddable SDK v11.5.0 was discovered to contain a heap-buffer-overflow via the component __asan_memcpy.
CVE-2021-46335 — Medium (CVSS 5.5): Moddable SDK v11.5.0 was discovered to contain a NULL pointer dereference in the component…
CVE-2021-46333 — Medium (CVSS 5.5): Moddable SDK v11.5.0 was discovered to contain an invalid memory access vulnerability via the component __asan_memmove.

All CVEs affecting Moddable Moddable Sdk →