Affected versions of Atlassian Confluence Server and Data Center allow remote attackers to impact the application's availability via a Deni…

published 2021-01-19 5y ago modified 2026-06-17 4mo ago also EUVD-2020-21823

cvss: 6.5; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 2.2%; EPSS 2.2% chance of exploitation in 30 days, percentile 82%
public exploits: 0; none known

Affected versions of Atlassian Confluence Server and Data Center allow remote attackers to impact the application's availability via a Denial of Service (DoS) vulnerability in the avatar upload feature. The affected versions are before version 7.2.0.

Patch / fix

fixed in 1

Atlassian Confluence Server 7.2.0

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Exploit prediction

2.24% chance of exploitation in the next 30 days, higher than 82% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
NVD	3.1	6.5	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD	2.0	4.0	AV:N/AC:L/Au:S/C:N/I:N/A:P

Affected products

Atlassian Confluence Server

Classification

Weakness

CWE-434 Unrestricted Upload of File with Dangerous Type

References

jira.atlassian.com /browse/CONFSERVER-60854
issue-tracking, vendor-advisory

Sources

CVE List CVE-2020-29450
NVD CVE-2020-29450

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