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XWiki Platform's async and display macro allow displaying and interacting with any document in restricted mode

Critical severity GitHub Reviewed Published Apr 18, 2023 in xwiki/xwiki-platform • Updated Nov 4, 2023

Package

maven org.xwiki.platform:xwiki-platform-oldcore (Maven)

Affected versions

>= 10.11.1, < 13.10.11
>= 14.0-rc-1, < 14.4.8
>= 14.5, < 14.10.3

Patched versions

13.10.11
14.4.8
14.10.3
maven org.xwiki.platform:xwiki-platform-rendering-async-macro (Maven)
>= 10.11.1, < 13.10.11
>= 14.0-rc-1, < 14.4.8
>= 14.5, < 14.10.3
13.10.11
14.4.8
14.10.3

Description

Impact

It's possible to display any page you cannot access through the combination of the async and display macro.

Steps to reproduce:

  1. Enable comments for guests by giving guests comment rights
  2. As a guest, create a comment with content {{async}}{{display reference="Menu.WebHome" /}}{{/async}}
  3. Open the comments viewer from the menu (appends ?viewer=comments to the URL)

-> the Menu.WebHome is displayed while the expectation would be to have an error that the current user is not allowed to see it

Patches

The vulnerability has been patched in XWiki 15.0-rc-1, 14.10.3, 14.4.8, and 13.10.11.

Workarounds

There is no known workaround.

References

https://jira.xwiki.org/browse/XWIKI-20394
https://jira.xwiki.org/browse/XRENDERING-694

For more information

If you have any questions or comments about this advisory:

References

@tmortagne tmortagne published to xwiki/xwiki-platform Apr 18, 2023
Published by the National Vulnerability Database Apr 19, 2023
Published to the GitHub Advisory Database Apr 20, 2023
Reviewed Apr 20, 2023
Last updated Nov 4, 2023

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
Low
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:L/UI:N/S:C/C:H/I:H/A:H

EPSS score

0.343%
(71st percentile)

Weaknesses

CVE ID

CVE-2023-29526

GHSA ID

GHSA-gpq5-7p34-vqx5

Source code

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