Home/CVE/Atlassian Jira Server and Data Center Path Traversal Vulnerability
CVE

CVE-2021-26086

Atlassian Jira Server and Data Center Path Traversal Vulnerability

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.

MEDIUM · CVSS 5.3 ⚠ CISA KEV EPSS 0.94189
Act now
  • Listed on CISA KEV (known exploited in the wild)
  • SSVC exploitation status: active
  • EPSS ≥ 0.50 - high probability of exploitation in the next 30 days
  • EPSS percentile: top 0% of all CVEs by exploitation likelihood
  • Public exploit or PoC is available
  • SSVC automatable: yes - attacks can be scripted at scale
Sigma rules0 YARA rules0
⬢

Required Remediation

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

⬡

Weakness Classification

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
▤

Affected Products & Versions

6
atlassian jira data center< 8.5.14
atlassian jira data center>= 8.6.0 and < 8.13.6
atlassian jira data center>= 8.14.0 and < 8.16.1
atlassian jira server< 8.5.14
atlassian jira server>= 8.6.0 and < 8.13.6
atlassian jira server>= 8.14.0 and < 8.16.1
⚠

Public Exploits & PoCs

3
webappsAtlassian Jira Server Data Center 8.16.0 - Arbitrary File Read2021-10-06
nucleiAtlassian Jira Limited - Local File Inclusionmedium
pocpacketstormsecurity.com · Atlassian-Jira-Server-Data-Center-8.4.0-File-Read.htmlpacketstormsecurity.com
▣

Scoring & Timeline

5.3
MEDIUM · CVSS v3.1 · security@atlassian.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD16 Aug 2021 · 01:15 AM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
SSVC triage · cisa-vulnrichment
Exploitation
active
Automatable
yes
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

1
cisaKEV-CVE-2021-26086
🔗

References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-26086US Government Resource
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