CVE-2023-22504Network attack vector

Unauthorized attachment upload via missing write-permission check

Published May 25, 2023 · Updated Oct 1, 2024

Broken access control in Atlassian Confluence Server and Data Center allows remote authenticated users to upload attachments to read-only pages. The attachments feature authorizes an upload for a user who can view the target page without requiring that user's write permission. Page-read access is required, and successful exploitation changes page content by adding an attacker-controlled attachment without granting broader page-edit rights.

CVSS severity4.3
Medium
EPSS probability0.75%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Broken access control in Atlassian Confluence Server and Data Center allows remote authenticated users to upload attachments to read-only pages. The attachments feature authorizes an upload for a user who can view the target page without requiring that user's write permission. Page-read access is required, and successful exploitation changes page content by adding an attacker-controlled attachment without granting broader page-edit rights.

The record

CVE
CVE-2023-22504
Published
May 25, 2023
Updated
Oct 1, 2024
Vendor
Atlassian
Product
Confluence Data Center
Classifications
CWE-434, T1105
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 25, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 1, 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=>= 1.1.2
  2. Affected versionversion=>= 7.14.0
  3. Affected versionversion=>= 7.20.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Atlassian · Confluence Data Centerversion=>= 1.1.2; version=>= 7.14.0; version=>= 7.20.0
Atlassian · Confluence Serverversion=>= 1.1.2; version=>= 7.14.0; version=>= 7.20.0

Published CVSS scores

6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
4.3AtlassianCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
T1105Ingress Tool Transfer

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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