CVE-2021-26086 KEV EXPLOIT
5.3
MEDIUM · CVSS 3.1 · EPSS 100% (pctl 100)
Patch first
On CISA KEV — known exploited in the wild, due 2024-12-03.
Description
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.
Scoring
| CVSS | 5.3 (MEDIUM, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
| EPSS | 100% — more likely to be exploited than 100% of all CVEs |
| Weakness | CWE-22 |
| On CISA KEV | yes — remediate by 2024-12-03 |
| Public exploit | yes |
| Published | 2021-08-16 |
| Last modified | 2026-06-17 |
CISA KEV
| Name | Atlassian Jira Server and Data Center Path Traversal Vulnerability |
|---|---|
| Added | 2024-11-12 |
| Due | 2024-12-03 |
| Vendor / product | Atlassian / Jira Server and Data Center |
| Ransomware use | none reported |
Affected (2)
| Vendor | Product |
|---|---|
| atlassian | jira data center |
| atlassian | jira server |
Public exploits
| Source | Title | Date |
|---|---|---|
| exploit-db | Atlassian Jira Server Data Center 8.16.0 - Arbitrary File Read | 2021-10-06 |
References
- http://packetstormsecurity.com/files/164405/Atlassian-Jira-Server-Data-Center-8.4.0-File-Read.html
- https://jira.atlassian.com/browse/JRASERVER-72695
- http://packetstormsecurity.com/files/164405/Atlassian-Jira-Server-Data-Center-8.4.0-File-Read.html
- https://jira.atlassian.com/browse/JRASERVER-72695
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-26086
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