How severe is CVE-2020-29447?

CVE-2020-29447 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 none, integrity none, and availability low.

Is CVE-2020-29447 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (58th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-29447?

CVE-2020-29447 affects Atlassian Crucible. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-29447?

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

When was CVE-2020-29447 published?

CVE-2020-29447 was published on 2020-12-21 and last updated on 2026-06-17.

CVE-2020-29447

CVE-2020-29447 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. The underlying weakness is classified as CWE-434.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
CVSS v2: 4.0
EPSS exploit prediction: 1% (58th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Affected product: Atlassian Crucible
Published: 2020-12-21
Last modified: 2026-06-17

Description

Affected versions of Atlassian Crucible allow remote attackers to impact the application's availability via a Denial of Service (DoS) vulnerability in the file upload request feature of code reviews. The affected versions are before version 4.7.4, and from version 4.8.0 before 4.8.5.

Frequently asked questions

What is CVE-2020-29447?: Affected versions of Atlassian Crucible allow remote attackers to impact the application's availability via a Denial of Service (DoS) vulnerability in the file upload request feature of code reviews. The affected versions are before version 4.7.4, and from version 4.8.0 before 4.8.5.
How severe is CVE-2020-29447?: CVE-2020-29447 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 none, integrity none, and availability low.
Is CVE-2020-29447 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (58th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-29447?: CVE-2020-29447 affects Atlassian Crucible. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-29447?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-29447 published?: CVE-2020-29447 was published on 2020-12-21 and last updated on 2026-06-17.

References

https://jira.atlassian.com/browse/CRUC-8505

Affected products (1)

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

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