CVE-2023-26478Network attack vector

Authorization bypass via unsafe attachment object exposure

Published Mar 2, 2023 · Updated Mar 5, 2025

Authorization bypass in affected XWiki Platform releases allows remote authenticated users to invoke dangerous attachment operations. The uploadTemporaryAttachment script service returns an internal XWikiAttachment object instead of the rights-checking API Attachment wrapper. Access requires an authenticated account with high privileges, and the vendor has not specified which dangerous methods can be invoked or their exact effects.

CVSS severity6.6
Medium
EPSS probability0.67%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in affected XWiki Platform releases allows remote authenticated users to invoke dangerous attachment operations. The uploadTemporaryAttachment script service returns an internal XWikiAttachment object instead of the rights-checking API Attachment wrapper. Access requires an authenticated account with high privileges, and the vendor has not specified which dangerous methods can be invoked or their exact effects.

The record

CVE
CVE-2023-26478
Published
Mar 2, 2023
Updated
Mar 5, 2025
Vendor
CryptPad
Product
XWiki Platform
Classifications
CWE-749, T1210
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 2, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 5, 2025Record 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=>= 14.3-rc-1, < 14.4.6
  2. Affected versionversion=>= 14.5, < 14.9-rc-1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

CryptPad · XWiki Platformversion=>= 14.3-rc-1, < 14.4.6; version=>= 14.5, < 14.9-rc-1

Published CVSS scores

8.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
6.6GitHubCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:L

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-749Exposed Dangerous Method or Function
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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