CVE-2021-39122Network attack vector

Email address disclosure via anonymous user search

Published Sep 8, 2021 · Updated Oct 10, 2024

Information disclosure in Atlassian Jira Server and Data Center allows remote attackers to read users' email addresses without authentication. The /rest/api/2/search endpoint returns email fields in anonymous user-search results; Atlassian has not published the faulty internal code path. Affected branches are before 8.5.13, 8.6.0 through 8.13.4, and 8.14.0 through 8.15.0; anonymous network access is sufficient, and the impact is limited to disclosure of user email addresses.

CVSS severity5.3
Medium
EPSS probability1.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Atlassian Jira Server and Data Center allows remote attackers to read users' email addresses without authentication. The /rest/api/2/search endpoint returns email fields in anonymous user-search results; Atlassian has not published the faulty internal code path. Affected branches are before 8.5.13, 8.6.0 through 8.13.4, and 8.14.0 through 8.15.0; anonymous network access is sufficient, and the impact is limited to disclosure of user email addresses.

The record

CVE
CVE-2021-39122
Published
Sep 8, 2021
Updated
Oct 10, 2024
Vendor
Atlassian
Product
Jira Server
Classifications
T1087
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 8, 2021CVE publishedPublication date reported by the CVE source.
  2. Oct 10, 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 <8.5.13
  2. Affected versionversion=8.14.0 <8.15.1
  3. Affected versionversion=8.14.0 <unspecified
  4. Affected versionversion=8.6.0 <8.13.5
  5. Affected versionversion=8.6.0 <unspecified
  6. Affected versionversion=unspecified <8.13.5
  7. Affected versionversion=unspecified <8.15.1
  8. Affected versionversion=unspecified <8.5.13

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Atlassian · Jira Serverversion=0 <8.5.13; version=8.14.0 <8.15.1; version=8.14.0 <unspecified; version=8.6.0 <8.13.5; version=8.6.0 <unspecified; version=unspecified <8.13.5; version=unspecified <8.15.1; version=unspecified <8.5.13
Atlassian · Jira Data Centerversion=0 <8.5.13; version=8.14.0 <8.15.1; version=8.14.0 <unspecified; version=8.6.0 <8.13.5; version=8.6.0 <unspecified; version=unspecified <8.13.5; version=unspecified <8.15.1; version=unspecified <8.5.13

Published CVSS scores

5.3CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/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
5.0NIST NVDAV:N/AC:L/Au:N/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.

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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

T1087Account 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

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Your stack

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