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CVE-2023-30533

20
FAUCET Score

CVE-2023-30533 is a high-severity prototype pollution vulnerability affecting SheetJS Community Edition versions prior to 0.19.3. This flaw allows an attacker to manipulate object prototypes via a specially crafted file, potentially leading to high impact on confidentiality, integrity, and availability. While there is no known active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered significant community discussion and media coverage, indicating awareness and potential for future exploitation.

Impacted Technologies

VendorProductVersion(s)CPE
< 0.19.3CPE matchmatch criteria
cpe:2.3:a:sheetjs:sheetjs:*:*:*:*:*:node.js:*:*

CVSS Data

CVSS version used by this source: 3.1

7.8HIGH

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.99%
Probability of exploitation in next 30 days
EPSS Percentile
58.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0099 is in the 56th percentile among its peer group of 11,617 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Advisories (1)

npmGHSA-4r6h-8v6p-xvw6high

Prototype Pollution in sheetJS

Apr 24, 2023

References

cdn.sheetjs.com / advisories/CVE-2023-30533
Vendor Advisory
git.sheetjs.com / sheetjs/sheetjs/issues/2986
git.sheetjs.com / sheetjs/sheetjs/src/branch/master/CHANGELOG.md
Release Notes