CVE-2021-46331

FAUCET Score

CVE-2021-46331 is a SEGV vulnerability affecting Moddable SDK v11.5.0, specifically within the fxProxyGetPrototype function in xs/sources/xsProxy.c. Rated as Medium severity (CVSS 5.5), this vulnerability requires local access and user interaction (UI:R) to trigger, leading to a high impact on availability (A:H) but no impact on confidentiality or integrity. There is currently no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

Vendor	Product	Version(s)	CPE
		11.5.0CPE matchmatch criteria	cpe:2.3:a:moddable:moddable_sdk:11.5.0:::::::*

CVSS Data

CVSS version used by this source: 3.1

5.5MEDIUM

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

Exploitability Score

1.8

Impact Score

3.6

CvssVersion

3.1

Exploit Intelligence

EPSS Score

0.72%

Probability of exploitation in next 30 days

EPSS Percentile

50.0%

Percentile rank of EPSS score among Peer Group

As of 2026-07-24

Model: v2026.06.15

This CVE's current EPSS score of 0.0072 is in the 56th percentile among its peer group of 5,758 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference

View patch

References

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

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