How severe is CVE-2021-43635?

CVE-2021-43635 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-43635 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-43635?

CVE-2021-43635 affects Codexnotes Codex. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-43635?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-43635 published?

CVE-2021-43635 was published on 2022-02-04 and last updated on 2026-06-17.

CVE-2021-43635

CVE-2021-43635 is a medium-severity vulnerability in Codexnotes Codex with a CVSS 3.x base score of 6.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 2% (76th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Codexnotes Codex
Published: 2022-02-04
Last modified: 2026-06-17

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.

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 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-43635 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-43635?: CVE-2021-43635 affects Codexnotes Codex. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-43635?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-43635 published?: CVE-2021-43635 was published on 2022-02-04 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:codexnotes:codex:*:*:*:*:*:*:*:*

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