How severe is CVE-2021-43955?

CVE-2021-43955 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-2021-43955 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-43955?

CVE-2021-43955 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-2021-43955?

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

When was CVE-2021-43955 published?

CVE-2021-43955 was published on 2022-03-16 and last updated on 2026-06-17.

CVE-2021-43955

CVE-2021-43955 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% (53rd percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Atlassian Crucible
Published: 2022-03-16
Last modified: 2026-06-17

Description

The /rest-service-fecru/server-v1 resource in Fisheye and Crucible before version 4.8.9 allowed authenticated remote attackers to obtain information about installation directories via information disclosure vulnerability.

Frequently asked questions

What is CVE-2021-43955?: The /rest-service-fecru/server-v1 resource in Fisheye and Crucible before version 4.8.9 allowed authenticated remote attackers to obtain information about installation directories via information disclosure vulnerability.
How severe is CVE-2021-43955?: CVE-2021-43955 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-2021-43955 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-43955?: CVE-2021-43955 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-2021-43955?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-43955 published?: CVE-2021-43955 was published on 2022-03-16 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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