CVE-2021-26075Network attack vector

Directory-path disclosure via invalid-filename error

Published Apr 14, 2021 · Updated Oct 17, 2024

Information disclosure in Atlassian Jira Server and Data Center allows remote authenticated users to obtain the application data directory path. The AttachTemporaryFile REST resource in the Jira importers plugin returns the full application data directory path in an error message when it processes an invalid filename. An authenticated REST request is required; exposure is limited to the path on versions before 8.5.12, 8.6.0 through 8.13.3, and 8.14.0 through 8.15.0.

CVSS severity4.3
Medium
EPSS probability1.61%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Information disclosure in Atlassian Jira Server and Data Center allows remote authenticated users to obtain the application data directory path. The AttachTemporaryFile REST resource in the Jira importers plugin returns the full application data directory path in an error message when it processes an invalid filename. An authenticated REST request is required; exposure is limited to the path on versions before 8.5.12, 8.6.0 through 8.13.3, and 8.14.0 through 8.15.0.

The record

CVE
CVE-2021-26075
Published
Apr 14, 2021
Updated
Oct 17, 2024
Vendor
Atlassian
Product
Jira Server
Classifications
T1083
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 14, 2021CVE publishedPublication date reported by the CVE source.
  2. Oct 17, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

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=8.6.0 <unspecified
  3. Affected versionversion=unspecified <8.13.4
  4. Affected versionversion=unspecified <8.15.1
  5. Affected versionversion=unspecified <8.5.12

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Atlassian · Jira Serverversion=8.14.0 <unspecified; version=8.6.0 <unspecified; version=unspecified <8.13.4; version=unspecified <8.15.1; version=unspecified <8.5.12
Atlassian · Jira Data Centerversion=8.14.0 <unspecified; version=8.6.0 <unspecified; version=unspecified <8.13.4; version=unspecified <8.15.1; version=unspecified <8.5.12

Published CVSS scores

4.3NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
4.0NVDAV:N/AC:L/Au:S/C:P/I:N/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1083File and Directory Discovery

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo