How severe is CVE-2020-2257?

CVE-2020-2257 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-2020-2257 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-2257?

CVE-2020-2257 affects Jenkins Validating String Parameter. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-2257?

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

When was CVE-2020-2257 published?

CVE-2020-2257 was published on 2020-09-16 and last updated on 2026-06-17.

CVE-2020-2257

CVE-2020-2257 is a medium-severity vulnerability in Jenkins Validating String Parameter 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% (50th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Jenkins Validating String Parameter
Published: 2020-09-16
Last modified: 2026-06-17

Description

Jenkins Validating String Parameter Plugin 2.4 and earlier does not escape various user-controlled fields, resulting in a stored cross-site scripting (XSS) vulnerability exploitable by attackers with Job/Configure permission.

Frequently asked questions

What is CVE-2020-2257?: Jenkins Validating String Parameter Plugin 2.4 and earlier does not escape various user-controlled fields, resulting in a stored cross-site scripting (XSS) vulnerability exploitable by attackers with Job/Configure permission.
How severe is CVE-2020-2257?: CVE-2020-2257 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-2020-2257 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-2257?: CVE-2020-2257 affects Jenkins Validating String Parameter. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-2257?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-2257 published?: CVE-2020-2257 was published on 2020-09-16 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:jenkins:validating_string_parameter:*:*:*:*:*:jenkins:*:*

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