CVE-2021-43635

MEDIUMNVD 6.16.1—

6.1

A Cross Site Scripting (XSS) vulnerability exists in Codex before 1.4.0 via Notebook/Page name field, which allows malicious users to execute arbitrary code via a crafted http code in a .json file.

CVSS v3: 6.1
EG Score: 6.1(medium)
EPSS: 80.1%
KEV: Not listed

Published

February 4, 2022

Last Modified

June 20, 2025

References (6)

cve@mitrehttps://github.com/jcv8000/Codex
cve@mitrehttps://github.com/jcv8000/Codex/issues/8
cve@mitrehttps://github.com/jcv8000/Codex/releases/tag/v1.4.1
af854a3a-2127-422b-91ae-364da2661108https://github.com/jcv8000/Codex
af854a3a-2127-422b-91ae-364da2661108https://github.com/jcv8000/Codex/issues/8
af854a3a-2127-422b-91ae-364da2661108https://github.com/jcv8000/Codex/releases/tag/v1.4.1

Weakness Classification(1)

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

CWE-79Cross-site Scripting (XSS)

Data Freshness Timeline

(refreshed 11× in last 7d / 20× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

2026-06-08 14:15 UTCEPSS rescore
2026-06-08 14:15 UTCEPSS rescore
2026-06-07 15:23 UTCEPSS rescore
2026-06-07 15:23 UTCEPSS rescore
2026-06-06 13:46 UTCEPSS rescore
2026-06-06 13:46 UTCEPSS rescore
2026-06-05 22:45 UTCEPSS rescore
2026-06-05 06:09 UTCEPSS rescore
2026-06-05 06:09 UTCEPSS rescore
2026-06-04 13:10 UTCEPSS rescore
2026-06-04 13:10 UTCEPSS rescore
2026-06-02 20:11 UTCEPSS rescore
2026-06-02 20:11 UTCEPSS rescore
2026-06-01 13:50 UTCEPSS rescore
2026-06-01 13:50 UTCEPSS rescore
2026-05-31 22:29 UTCEPSS rescore
2026-05-31 22:29 UTCEPSS rescore
2026-05-31 00:15 UTCEPSS rescore
2026-05-31 00:15 UTCEPSS rescore
2026-05-29 13:42 UTCEPSS rescore

Frequently asked(5)

What is CVE-2021-43635?

CVE-2021-43635 is a medium vulnerability published on February 4, 2022. A Cross Site Scripting (XSS) vulnerability exists in Codex before 1.4.0 via Notebook/Page name field, which allows malicious users to execute arbitrary code via a crafted http code in a .json file.

When was CVE-2021-43635 disclosed?

CVE-2021-43635 was first published in the National Vulnerability Database on February 4, 2022, with the most recent update on June 20, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-43635 actively exploited?

CVE-2021-43635 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 80.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-43635?

CVE-2021-43635 has a CVSS v3 base score of 6.1 (NVD).

How do I remediate CVE-2021-43635?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-43635, 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-2021-43635

📅 Published

🔄 Last Modified

🔗 References (6)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-43635?

🔗 Related CVEs(same CWE)

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Published

Last Modified

References (6)

Frequently asked(5)

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