CVE-2019-20101Network attack vector

Whitelist rule disclosure via missing endpoint authorization

Published Sep 14, 2021 · Updated Oct 9, 2024

Improper authorization in Atlassian Jira Server and Data Center before 8.13.3 and 8.14.0 allows remote attackers to view whitelist rules. The /rest/whitelist//check endpoint returns configured whitelist-rule data without enforcing authentication or authorization. No account or user interaction is required; exposure is limited to reading whitelist configuration, with no reported modification or service interruption.

CVSS severity5.3
Medium
EPSS probability1.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authorization in Atlassian Jira Server and Data Center before 8.13.3 and 8.14.0 allows remote attackers to view whitelist rules. The /rest/whitelist//check endpoint returns configured whitelist-rule data without enforcing authentication or authorization. No account or user interaction is required; exposure is limited to reading whitelist configuration, with no reported modification or service interruption.

The record

CVE
CVE-2019-20101
Published
Sep 14, 2021
Updated
Oct 9, 2024
Vendor
Atlassian
Product
Jira Server
Classifications
T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 14, 2021CVE publishedPublication date reported by the CVE source.
  2. Oct 9, 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=0 <8.13.3
  2. Affected versionversion=8.14.0 <8.14.1
  3. Affected versionversion=8.14.0 <unspecified
  4. Affected versionversion=unspecified <8.13.3
  5. Affected versionversion=unspecified <8.14.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Atlassian · Jira Serverversion=0 <8.13.3; version=8.14.0 <8.14.1; version=8.14.0 <unspecified; version=unspecified <8.13.3; version=unspecified <8.14.1
Atlassian · Jira Data Centerversion=0 <8.13.3; version=8.14.0 <8.14.1; version=8.14.0 <unspecified; version=unspecified <8.13.3; version=unspecified <8.14.1

Published CVSS scores

5.0NIST NVDAV:N/AC:L/Au:N/C:P/I:N/A:N
5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
5.3CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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