How severe is CVE-2021-23413?

CVE-2021-23413 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2021-23413 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-23413?

CVE-2021-23413 affects Jszip Project Jszip. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-23413?

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

When was CVE-2021-23413 published?

CVE-2021-23413 was published on 2021-07-25 and last updated on 2026-06-17.

CVE-2021-23413

CVE-2021-23413 is a medium-severity vulnerability in Jszip Project Jszip with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 5.0
EPSS exploit prediction: 3% (87th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Jszip Project Jszip
Published: 2021-07-25
Last modified: 2026-06-17

Description

This affects the package jszip before 3.7.0. Crafting a new zip file with filenames set to Object prototype values (e.g __proto__, toString, etc) results in a returned object with a modified prototype instance.

Frequently asked questions

What is CVE-2021-23413?: This affects the package jszip before 3.7.0. Crafting a new zip file with filenames set to Object prototype values (e.g __proto__, toString, etc) results in a returned object with a modified prototype instance.
How severe is CVE-2021-23413?: CVE-2021-23413 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2021-23413 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-23413?: CVE-2021-23413 affects Jszip Project Jszip. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-23413?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-23413 published?: CVE-2021-23413 was published on 2021-07-25 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:jszip_project:jszip:*:*:*:*:*:node.js:*:*

More vulnerabilities in Jszip Project Jszip

CVE-2022-48285 — High (CVSS 7.3): loadAsync in JSZip before 3.8.0 allows Directory Traversal via a crafted ZIP archive.

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