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CVE-2021-30503

29
FAUCET Score

CVE-2021-30503 is a critical remote code execution vulnerability affecting the unofficial GLSL Linting extension for Visual Studio Code, specifically versions prior to 1.4.0. An attacker can exploit this by crafting a malicious workspace configuration that manipulates the glslangValidatorPath. With a CVSS score of 9.8, this vulnerability allows for complete compromise of confidentiality, integrity, and availability with no user interaction required. Despite its severity, there is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.4.0CPE matchmatch criteria
cpe:2.3:a:glsl_linting_project:glsl_linting:*:*:*:*:*:visual_studio_code:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.91%
Probability of exploitation in next 30 days
EPSS Percentile
85.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0291 is in the 76th percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 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 / hsimpson/vscode-glsllint/commit/3effba525bdff7d4257e66a6815ff956d2bce8ac
PatchThird Party Advisory
marketplace.visualstudio.com / items/CADENAS.vscode-glsllint/changelog
Release NotesThird Party Advisory
vuln.ryotak.me / advisories/27
Third Party Advisory