CVE-2023-22521Network attack vector

Authenticated arbitrary code execution

Published Nov 21, 2023 · Updated Aug 2, 2024

Remote code execution in Atlassian Crowd Data Center and Server 3.4.6 through 5.1.5 and 5.2.0 allows remote authenticated users to execute code. Atlassian has not disclosed the affected component or the operation that mishandles attacker-controlled input. Exploitation requires high-privileged authentication and a high-complexity condition; successful execution compromises the Crowd host without user interaction.

CVSS severity8.0
High
EPSS probability1.21%
Next 30 days · Sep 17, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Remote code execution in Atlassian Crowd Data Center and Server 3.4.6 through 5.1.5 and 5.2.0 allows remote authenticated users to execute code. Atlassian has not disclosed the affected component or the operation that mishandles attacker-controlled input. Exploitation requires high-privileged authentication and a high-complexity condition; successful execution compromises the Crowd host without user interaction.

The record

CVE
CVE-2023-22521
Published
Nov 21, 2023
Updated
Aug 2, 2024
Vendor
Atlassian
Product
Crowd Server
Classifications
T1210
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 21, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 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=>= 3.4.6
  2. Affected versionversion=>= 5.2.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Atlassian · Crowd Serverversion=>= 3.4.6; version=>= 5.2.0
Atlassian · Crowd Data Centerversion=>= 3.4.6; version=>= 5.2.0

Published CVSS scores

8.8NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.0AtlassianCVSS:3.0/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H

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 11, 2026Sep 17, 2026
Latest reporting daySep 17, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1210Exploitation of Remote Services

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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