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Remote code execution using the confluence paste code macro

Critical
Farcasut published GHSA-5w8v-h22g-j2mp Sep 9, 2025

Package

maven com.xwiki.pro:xwiki-pro-macros (Maven)

Affected versions

>=1.0

Patched versions

1.26.5

Description

Summary

Missing escaping of the title in the confluence paste code macro allows remote code execution for any user who can edit any page

Details

The classes parameter is used without escaping in XWiki syntax, thus allowing XWiki syntax injection which enables remote code execution

Poc
As a user add the panel macro and in the classes parameter input ' %)((({{async}}{{groovy}}println("Hello from Groovy!"){{/groovy}}{{/async}} or just using viewing rights using https://jira.xwiki.org/browse/XWIKI-20449

Severity

Critical

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

CVE ID

CVE-2025-55730

Weaknesses

No CWEs