How severe is CVE-2020-2207?

CVE-2020-2207 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-2020-2207 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-2207?

CVE-2020-2207 affects Jenkins Vncviewer. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-2207?

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

When was CVE-2020-2207 published?

CVE-2020-2207 was published on 2020-07-02 and last updated on 2026-06-17.

CVE-2020-2207

CVE-2020-2207 is a medium-severity vulnerability in Jenkins Vncviewer 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: 1% (54th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Jenkins Vncviewer
Published: 2020-07-02
Last modified: 2026-06-17

Description

Jenkins VncViewer Plugin 1.7 and earlier does not escape a parameter value in the checkVncServ form validation endpoint, resulting in a reflected cross-site scripting (XSS) vulnerability.

Frequently asked questions

What is CVE-2020-2207?: Jenkins VncViewer Plugin 1.7 and earlier does not escape a parameter value in the checkVncServ form validation endpoint, resulting in a reflected cross-site scripting (XSS) vulnerability.
How severe is CVE-2020-2207?: CVE-2020-2207 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-2020-2207 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-2207?: CVE-2020-2207 affects Jenkins Vncviewer. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-2207?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-2207 published?: CVE-2020-2207 was published on 2020-07-02 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:jenkins:vncviewer:*:*:*:*:*:jenkins:*:*

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