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CVE-2023-51661

24
FAUCET Score

CVE-2023-51661 is a high-severity vulnerability affecting Wasmer, a WebAssembly runtime, allowing untrusted Wasm programs to access the host filesystem outside of their intended sandbox. With a CVSS score of 8.6, this vulnerability presents a critical risk (AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N), enabling remote attackers to compromise the confidentiality of the host system. While no active exploitation, public exploit code, or significant community discussion has been observed, the vulnerability has been patched in Wasmer version 4.2.4.

Impacted Technologies

VendorProductVersion(s)CPE
>= 3.0.0, < 4.2.4CPE matchmatch criteria
cpe:2.3:a:wasmer:wasmer:*:*:*:*:*:rust:*:*

CVSS Data

CVSS version used by this source: 3.1

8.4HIGH

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.5
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.60%
Probability of exploitation in next 30 days
EPSS Percentile
44.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0060 is in the 22nd percentile among its peer group of 51,551 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 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 (2)

github_advisorypatch availablevia nvd_reference
View patch
rustpatch availablevia ghsa
Product: wasmer-cliFixed in: 4.2.4

Vendor Advisories (1)

rustGHSA-4mq4-7rw3-vm5jhigh

Wasmer filesystem sandbox not enforced

Dec 13, 2023

References

github.com / wasmerio/wasmer/commit/4d63febf9d8b257b0531963b85df48d45d0dbf3c
Patch
github.com / wasmerio/wasmer/issues/4267
Issue Tracking
github.com / wasmerio/wasmer/security/advisories/GHSA-4mq4-7rw3-vm5j
ExploitVendor Advisory