Medium severity · published Aug 3, 2021
CVE-2021-26085
Atlassian Confluence Server Pre-Authorization Arbitrary File Read Vulnerability
RansomwareIn wildKEV
5.3
CVSS
99.9%
EPSS
Yes
On KEV
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. The affected versions are before version 7.4.10, and from version 7.5.0 before 7.12.3.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)99.9% · higher than 100% of CVEs
Exploited in the wildYes
CISA KEVListed Mar 28, 2022
Federal remediation dueApr 18, 2022
Ransomware campaign useKnown
Affected products
Which versions
CO
Confluence · Atlassian
before 7.4.10; 7.5.0 before unspecified; before 7.12.3 · source: vendor, NVD, KEV
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-26085
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-26085
CISA KEV catalogue
https://www.cisa.gov/known-exploited-vulnerabilities-catalog
x_refsource_MISC
https://jira.atlassian.com/browse/CONFSERVER-67893
x_refsource_MISC
http://packetstormsecurity.com/files/164401/Atlassian-Confluence-Server-7.5.1-Arbitrary-File-Read.html
More from Confluence
9.8
CVE-2023-22527
Atlassian Confluence Data Center and Server Template Injection Vulnerability
9.8
CVE-2023-22518
Atlassian Confluence Data Center and Server Improper Authorization Vulnerability
9.8
CVE-2023-22515
Atlassian Confluence Data Center and Server Broken Access Control Vulnerability
9.8
CVE-2022-26138
Atlassian Questions For Confluence App Hard-coded Credentials Vulnerability
9.8
CVE-2022-26134
Atlassian Confluence Server and Data Center Remote Code Execution Vulnerability