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CVE-2021-26085

Quick assessment

Affected
Atlassian Confluence Server
Exploitation
Confirmed exploitation in the wild; remediate immediately
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Atlassian Confluence Server是澳大利亚Atlassian公司的一套具有企业知识管理功能，并支持用于构建企业WiKi的协同软件的服务器版本。 Atlassian Confluence Server 存在安全漏洞，该漏洞允许远程攻击者通过 /s/ 端点中的预授权任意文件读取漏洞查看受限资源。以下产品和版本受到影响：7.4.10 之前的版本，以及 7.12.3 之前的 7.5.0 版本。

AI Predicted 7.5 Difficulty: Easy KEV · Ransomware EPSS 99.94% · P100

Public Exploits 2

ExploitDB · 1 EDB-50377 [webapps]
Nuclei · 1 CVE-2021-26085.yaml [template]

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage
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I. Basic Information for CVE-2021-26085

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Atlassian Confluence Server 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Atlassian Confluence Server是澳大利亚Atlassian公司的一套具有企业知识管理功能，并支持用于构建企业WiKi的协同软件的服务器版本。 Atlassian Confluence Server 存在安全漏洞，该漏洞允许远程攻击者通过 /s/ 端点中的预授权任意文件读取漏洞查看受限资源。以下产品和版本受到影响：7.4.10 之前的版本，以及 7.12.3 之前的 7.5.0 版本。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Shenlong Deep Dive — AI Deep Analysis

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Affected Products

Vendor Product Affected Versions CPE Subscribe
Atlassian Confluence Server unspecified ~ 7.4.10 -
Atlassian Confluence Data Center unspecified ~ 7.4.10 -

II. Public POCs for CVE-2021-26085

# POC Description Source Link Shenlong Link
1 Atlassian Confluence Server 7.5.1 Pre-Authorization Arbitrary File Read vulnerability (CVE-2021-26085) https://github.com/ColdFusionX/CVE-2021-26085 POC Details
2 Atlassian Confluence Server allows remote attackers to view restricted resources via local file inclusion in the /s/ endpoint. https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-26085.yaml POC Details
3 None https://github.com/Threekiii/Awesome-POC/blob/master/Web%E5%BA%94%E7%94%A8%E6%BC%8F%E6%B4%9E/Atlassian%20Confluence%20%E6%95%8F%E6%84%9F%E4%BF%A1%E6%81%AF%E6%B3%84%E9%9C%B2%20CVE-2021-26085.md POC Details
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III. Intelligence Information for CVE-2021-26085

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Exploits & Public PoCs for CVE-2021-26085 (1)

Other References for CVE-2021-26085 (1)

IV. Related Vulnerabilities

Same product: Confluence Server
Same vendor: Atlassian

V. Comments for CVE-2021-26085

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