How severe is CVE-2020-4015?

CVE-2020-4015 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-2020-4015 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-4015?

CVE-2020-4015 primarily affects Atlassian Crucible. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-4015?

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

When was CVE-2020-4015 published?

CVE-2020-4015 was published on 2020-06-01 and last updated on 2026-06-17.

CVE-2020-4015

CVE-2020-4015 is a medium-severity vulnerability in Atlassian Crucible 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% (57th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Atlassian Crucible
Published: 2020-06-01
Last modified: 2026-06-17

Description

The /json/fe/activeUserFinder.do resource in Altassian Fisheye and Crucible before version 4.8.1 allows remote attackers to view user user email addresses via a information disclosure vulnerability.

Frequently asked questions

What is CVE-2020-4015?: The /json/fe/activeUserFinder.do resource in Altassian Fisheye and Crucible before version 4.8.1 allows remote attackers to view user user email addresses via a information disclosure vulnerability.
How severe is CVE-2020-4015?: CVE-2020-4015 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-2020-4015 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-4015?: CVE-2020-4015 primarily affects Atlassian Crucible. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-4015?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-4015 published?: CVE-2020-4015 was published on 2020-06-01 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:atlassian:crucible:*:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:fisheye:*:*:*:*:*:*:*:*

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