CVE-2021-26070Network attack vector

Unauthenticated protected-resource access via makeRequest proxy

Published Mar 22, 2021 · Updated Sep 16, 2024

Broken authentication in Atlassian Jira Server and Data Center before 8.13.3 and in 8.14.0 allows remote attackers to reach app-linked resources. The makeRequest gadget resource proxies requests to an application-link origin without preserving the behind-the-firewall access restriction. No authentication or user interaction is required, and exposure is limited to resources reachable through a configured application link.

CVSS severity7.2
High
EPSS probability1.96%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Broken authentication in Atlassian Jira Server and Data Center before 8.13.3 and in 8.14.0 allows remote attackers to reach app-linked resources. The makeRequest gadget resource proxies requests to an application-link origin without preserving the behind-the-firewall access restriction. No authentication or user interaction is required, and exposure is limited to resources reachable through a configured application link.

The record

CVE
CVE-2021-26070
Published
Mar 22, 2021
Updated
Sep 16, 2024
Vendor
Atlassian
Product
Jira Server
Classifications
CWE-287
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 22, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=8.14.0 <unspecified
  2. Affected versionversion=unspecified <8.13.3
  3. Affected versionversion=unspecified <8.14.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Atlassian · Jira Serverversion=8.14.0 <unspecified; version=unspecified <8.13.3; version=unspecified <8.14.1
Atlassian · Jira Data Centerversion=8.14.0 <unspecified; version=unspecified <8.13.3; version=unspecified <8.14.1

Published CVSS scores

6.4NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:N
7.2NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-287Improper Authentication

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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