Vulnerability Details : CVE-2021-26085

Used for ransomware!
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.
Published 2021-08-03 00:15:09
Updated 2022-06-10 14:25:54
Source Atlassian
View at NVD,   CVE.org

Products affected by CVE-2021-26085

CVE-2021-26085 is in the CISA Known Exploited Vulnerabilities Catalog

This issue is known to have been leveraged as part of a ransomware campaign.
CISA vulnerability name:
Atlassian Confluence Server Pre-Authorization Arbitrary File Read Vulnerability
CISA required action:
Apply updates per vendor instructions.
CISA description:
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.
Notes:
https://nvd.nist.gov/vuln/detail/CVE-2021-26085
Added on 2022-03-28 Action due date 2022-04-18

Exploit prediction scoring system (EPSS) score for CVE-2021-26085

EPSS FAQ
96.03%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 100 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-26085

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
5.0
 MEDIUM AV:N/AC:L/Au:N/C:P/I:N/A:N
10.0
2.9
 NIST
5.3
 MEDIUM CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
3.9
1.4
 NIST

CWE ids for CVE-2021-26085

  • The product does not perform an authorization check when an actor attempts to access a resource or perform an action.
    Assigned by: nvd@nist.gov (Primary)

References for CVE-2021-26085

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