How severe is CVE-2020-2221?

CVE-2020-2221 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-2020-2221 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-2221?

CVE-2020-2221 primarily affects Jenkins. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-2221?

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

When was CVE-2020-2221 published?

CVE-2020-2221 was published on 2020-07-15 and last updated on 2026-06-17.

CVE-2020-2221

CVE-2020-2221 is a medium-severity vulnerability in Jenkins 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: 1% (61st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Jenkins
Published: 2020-07-15
Last modified: 2026-06-17

Description

Jenkins 2.244 and earlier, LTS 2.235.1 and earlier does not escape the upstream job's display name shown as part of a build cause, resulting in a stored cross-site scripting vulnerability.

Frequently asked questions

What is CVE-2020-2221?: Jenkins 2.244 and earlier, LTS 2.235.1 and earlier does not escape the upstream job's display name shown as part of a build cause, resulting in a stored cross-site scripting vulnerability.
How severe is CVE-2020-2221?: CVE-2020-2221 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-2020-2221 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-2221?: CVE-2020-2221 primarily affects Jenkins. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-2221?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-2221 published?: CVE-2020-2221 was published on 2020-07-15 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:jenkins:jenkins:*:*:*:*:lts:*:*:*
cpe:2.3:a:jenkins:jenkins:*:*:*:*:-:*:*:*

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