How severe is CVE-2021-42053?

CVE-2021-42053 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-42053 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-42053?

CVE-2021-42053 affects Django-unicorn Unicorn. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-42053?

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

When was CVE-2021-42053 published?

CVE-2021-42053 was published on 2021-10-07 and last updated on 2026-06-17.

CVE-2021-42053

CVE-2021-42053 is a medium-severity vulnerability in Django-unicorn Unicorn with a CVSS 3.x base score of 5.4. 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 5.4)
CVSS v2: 3.5
EPSS exploit prediction: 3% (83rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Django-unicorn Unicorn
Published: 2021-10-07
Last modified: 2026-06-17

Description

The Unicorn framework through 0.35.3 for Django allows XSS via component.name.

Frequently asked questions

What is CVE-2021-42053?: The Unicorn framework through 0.35.3 for Django allows XSS via component.name.
How severe is CVE-2021-42053?: CVE-2021-42053 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-42053 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-42053?: CVE-2021-42053 affects Django-unicorn Unicorn. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-42053?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-42053 published?: CVE-2021-42053 was published on 2021-10-07 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:django-unicorn:unicorn:*:*:*:*:*:django:*:*

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