CVE-2021-26085Atlassian Confluence Server Pre-Authorization Arbitrary File Read Vulnerability

Affected versions of Atlassian Confluence Server allow remote attackers to view restricted resources via a Pre-Authorization Arbitrary File Read vulnerability in the /s/ endpoint. The affected versions are before version 7.4.10, and from version 7.5.0 before 7.12.3.

5.3 MEDIUMEPSS 99.93%⚡ Known Exploited (CISA KEV)NVD: Analyzed

Last updated: 2026-06-17 03:42 UTC

OverviewCVSS details

5.3MEDIUMCVSS 3.1

Score source: NVD
NVD status: Analyzed
Published: Aug 3, 2021
Assigner: atlassian

Affected

Confluence Server (Atlassian)

Versions: before 7.4.10 · 7.5.0 before unspecified
Fixed in: 7.4.10, unspecified, 7.12.3

+1 more product →

Exploitation

Public exploit: Yes · 1 reference
CISA KEV: Listed · Mar 28, 2022
KEV due date: Apr 18, 2022
Ransomware use: Known
SSVC: Exploitation active · Automatable yes · Impact partial

EPSS · FIRST, scored Nov 7

99.93%chance of exploitation in 30 days

Higher than 99.97% of CVEs

CVSS 3.1 · NVD

5.3Medium

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality impact: Low
Integrity impact: None
Availability impact: None

CVSS 2.0 · NVD

5.0Medium

AV:N/AC:L/Au:N/C:P/I:N/A:N

Attack vector: Network
Attack complexity: Low
Authentication: None
Confidentiality impact: Partial
Integrity impact: None
Availability impact: None

NVD status: Analyzed

Overview Affected Products References

NVD CVE.org

Overview

Severity

Score	Severity	Version	Vector String
5.3	MEDIUM	3.1NVD	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
5.0	MEDIUM	2.0NVD	AV:N/AC:L/Au:N/C:P/I:N/A:N

CISA required action

⚡ Known exploited · remediation due Apr 18, 2022

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Details

CVE ID: CVE-2021-26085
Status: Analyzed
Assigner (CNA): atlassian
Published: Aug 3, 2021
Last modified: 2026-06-17 03:42 UTC
Weaknesses: CWE-425

Sources

Refreshed hourly from the sources above. Last fetched 2026-11-08 13:26 UTC.