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XWiki Platform privilege escalation (PR)/RCE from account through Invitation subject/message

Critical severity GitHub Reviewed Published Aug 17, 2023 in xwiki/xwiki-platform • Updated Nov 11, 2023

Package

maven org.xwiki.platform:xwiki-platform-invitation-ui (Maven)

Affected versions

>= 2.5-m-1, < 14.4.8
>= 14.5, < 14.10.6
>= 15.0-rc-1, < 15.2-rc-1

Patched versions

14.4.8
14.10.6
15.2-rc-1

Description

Impact

Any user who can view Invitation.WebHome can execute arbitrary script macros including Groovy and Python macros that allow remote code execution including unrestricted read and write access to all wiki contents. This can be reproduced with the following steps:

  1. Open the invitation application (Invitation.WebHome).
  2. Set the subject to {{cache}}{{groovy}}new File("/tmp/exploit.txt").withWriter { out -> out.println("Attacked from invitation!"); }{{/groovy}}{{/cache}}
  3. Click "Preview"

Patches

The vulnerability has been patched on XWiki 14.4.8, 15.2-rc-1, and 14.10.6.

Workarounds

The vulnerability can be patched manually by applying the patch on Invitation.InvitationCommon and Invitation.InvitationConfig.

References

For more information

If you have any questions or comments about this advisory:

References

@manuelleduc manuelleduc published to xwiki/xwiki-platform Aug 17, 2023
Published by the National Vulnerability Database Aug 17, 2023
Published to the GitHub Advisory Database Aug 18, 2023
Reviewed Aug 18, 2023
Last updated Nov 11, 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
Low

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:L

EPSS score

0.943%
(84th percentile)

Weaknesses

CVE ID

CVE-2023-37914

GHSA ID

GHSA-7954-6m9q-gpvf

Source code

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