CVE-2021-43635

Name: CVE-2021-43635
Creator: NVD / NIST
Published: 2022-02-04T18:15:07.287+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 1.66%

Last modified Jun 17, 2026

CVE-2021-43635 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. 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.. EPSS estimates a 1.66% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

6.1/10

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

EPSS Probability

1.66%

73.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Codexnotes	Codex	< 1.4.0

References

https://github.com/jcv8000/CodexProduct, Third Party Advisory
https://github.com/jcv8000/Codex/issues/8Exploit, Third Party Advisory
https://github.com/jcv8000/Codex/releases/tag/v1.4.1Release Notes, Third Party Advisory
https://github.com/jcv8000/CodexProduct, Third Party Advisory
https://github.com/jcv8000/Codex/issues/8Exploit, Third Party Advisory
https://github.com/jcv8000/Codex/releases/tag/v1.4.1Release Notes, Third Party Advisory

Timeline

Published: Feb 4, 2022
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2021-43635?

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.

How severe is CVE-2021-43635?

CVE-2021-43635 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 1.66% probability of exploitation in the next 30 days.

How do I fix CVE-2021-43635?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-43635?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST