PT-2021-16951 · Atlassian · Jira

Published 2021-08-16 · Updated 2026-03-31 · CVE-2021-26086

Positive Technologies (AI Summary)

CVSS v3.1

5.3

Medium

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Name of the Vulnerable Software and Affected Versions Atlassian Jira Server and Data Center versions prior to 8.5.14 Atlassian Jira Server and Data Center versions 8.6.0 through 8.13.6 Atlassian Jira Server and Data Center versions 8.14.0 through 8.16.1

Description The issue allows remote attackers to read particular files via a path traversal vulnerability in the "/WEB-INF/web.xml" endpoint. This vulnerability is actively exploited.

Recommendations For versions prior to 8.5.14, update to version 8.5.14 or later. For versions 8.6.0 through 8.13.6, update to version 8.13.6 or later. For versions 8.14.0 through 8.16.1, update to version 8.16.1 or later. As a temporary workaround, consider restricting access to the "/WEB-INF/web.xml" endpoint until a patch is available.

Exploit

Fix

Path traversal

Weakness Enumeration

CWE-22

Related Identifiers

CVE-2021-26086

Affected Products

Jira

References · 30

• 🔥 https://github.com/ColdFusionX/CVE-2021-26086 · Exploit
• 🔥 http://packetstormsecurity.com/files/164405/Atlassian-Jira-Server-Data-Center-8.4.0-File-Read.html · Exploit
• 🔥 https://exploit-db.com/exploits/50380 · Exploit
• https://osv.dev/vulnerability/CVE-2021-26086 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-26086 · Security Note
• https://twitter.com/Loginsoft_Inc/status/1856714159653875980 · Twitter Post
• https://twitter.com/DeusLogica/status/2038713980370251928 · Twitter Post
• https://t.me/defcon_news/89320 · Telegram Post
• https://twitter.com/DeusLogica/status/2039110963429786052 · Twitter Post
• https://t.me/cvenotify/101463 · Telegram Post
• https://t.me/cvenotify/20353 · Telegram Post
• https://cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-26086 · Note
• https://t.me/aptreports/14531 · Telegram Post
• https://twitter.com/Loginsoft_Intel/status/2015900264365228280 · Twitter Post
• https://t.me/cvenotify/19374 · Telegram Post