atlassian data-center CVE-2021-26086 vulnerability in Atlassian Products
Published on August 16, 2021

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Affected versions of Atlassian Jira Server and Data Center allow remote attackers to read particular files via a path traversal vulnerability in the /WEB-INF/web.xml endpoint. The affected versions are before version 8.5.14, from version 8.6.0 before 8.13.6, and from version 8.14.0 before 8.16.1.

NVD

Known Exploited Vulnerability

This Atlassian Jira Server and Data Center Path Traversal Vulnerability is part of CISA's list of Known Exploited Vulnerabilities. Atlassian Jira Server and Data Center contain a path traversal vulnerability that allows a remote attacker to read particular files in the /WEB-INF/web.xml endpoint.

The following remediation steps are recommended / required by December 3, 2024: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Vulnerability Analysis

CVE-2021-26086 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. This vulnerability is known to be actively exploited by threat actors in an automatable fashion. The potential impact of an exploit of this vulnerability is considered to have a small impact on confidentiality, a small impact on integrity and availability.

Attack Vector:
NETWORK
Attack Complexity:
LOW
Privileges Required:
NONE
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
LOW
Integrity Impact:
NONE
Availability Impact:
NONE

Weakness Type

What is a Directory traversal Vulnerability?

The software uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the software does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

CVE-2021-26086 has been classified to as a Directory traversal vulnerability or weakness.


Products Associated with CVE-2021-26086

You can be notified by email with stack.watch whenever vulnerabilities like CVE-2021-26086 are published in these products:

Atlassian Data Center
 
Atlassian Jira
 

Affected Versions

Atlassian Jira Server: Atlassian Jira Data Center: atlassian jira_server: atlassian jira_server: atlassian jira_server: atlassian jira_data_center: atlassian jira_data_center: atlassian jira_data_center:

Exploit Probability

EPSS
94.19%
Percentile
99.92%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.