CVE-2021-33797

CRITICALNVD 9.89.8—Elevated

9.8

Buffer-overflow in jsdtoa.c in Artifex MuJS in versions 1.0.1 to 1.1.1. An integer overflow happens when js_strtod() reads in floating point exponent, which leads to a buffer overflow in the pointer *d.

CVSS v3: 9.8
EG Score: 9.8(medium)
EPSS: 60.6%
KEV: Not listed

Published

April 17, 2023

Last Modified

February 6, 2025

References (5)

patrick@puiterwijkhttps://github.com/ccxvii/mujs/commit/833b6f1672b4f2991a63c4d05318f0b84ef4d550
patrick@puiterwijkhttps://github.com/ccxvii/mujs/issues/148
af854a3a-2127-422b-91ae-364da2661108https://github.com/ccxvii/mujs/commit/833b6f1672b4f2991a63c4d05318f0b84ef4d550
af854a3a-2127-422b-91ae-364da2661108https://github.com/ccxvii/mujs/issues/148
134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/ccxvii/mujs/issues/148

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 12× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

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Frequently asked(5)

What is CVE-2021-33797?

CVE-2021-33797 is a critical vulnerability published on April 17, 2023. Buffer-overflow in jsdtoa.c in Artifex MuJS in versions 1.0.1 to 1.1.1. An integer overflow happens when js_strtod() reads in floating point exponent, which leads to a buffer overflow in the pointer *d.

When was CVE-2021-33797 disclosed?

CVE-2021-33797 was first published in the National Vulnerability Database on April 17, 2023, with the most recent update on February 6, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-33797 actively exploited?

CVE-2021-33797 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 60.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-33797?

CVE-2021-33797 has a CVSS v3 base score of 9.8 (NVD).

How do I remediate CVE-2021-33797?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-33797, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2021-33797

📅 Published

🔄 Last Modified

🔗 References (5)

Weakness Classification(2)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-33797?

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References (5)

Frequently asked(5)

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