How severe is CVE-2020-2306?

CVE-2020-2306 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2020-2306 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-2020-2306?

CVE-2020-2306 affects Jenkins Mercurial. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-2306?

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

When was CVE-2020-2306 published?

CVE-2020-2306 was published on 2020-11-04 and last updated on 2026-06-17.

CVE-2020-2306

CVE-2020-2306 is a medium-severity vulnerability in Jenkins Mercurial with a CVSS 3.x base score of 4.3. 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 4.3)
CVSS v2: 4.0
EPSS exploit prediction: 1% (61st percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Jenkins Mercurial
Published: 2020-11-04
Last modified: 2026-06-17

Description

A missing permission check in Jenkins Mercurial Plugin 2.11 and earlier allows attackers with Overall/Read permission to obtain a list of names of configured Mercurial installations.

Frequently asked questions

What is CVE-2020-2306?: A missing permission check in Jenkins Mercurial Plugin 2.11 and earlier allows attackers with Overall/Read permission to obtain a list of names of configured Mercurial installations.
How severe is CVE-2020-2306?: CVE-2020-2306 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2020-2306 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-2020-2306?: CVE-2020-2306 affects Jenkins Mercurial. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-2306?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-2306 published?: CVE-2020-2306 was published on 2020-11-04 and last updated on 2026-06-17.

References

https://www.jenkins.io/security/advisory/2020-11-04/#SECURITY-2104

Affected products (1)

cpe:2.3:a:jenkins:mercurial:*:*:*:*:*:jenkins:*:*

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