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XWiki Platform may allow privilege escalation to programming rights via user's first name

Critical severity GitHub Reviewed Published Mar 1, 2023 in xwiki/xwiki-commons • Updated Mar 3, 2023

Package

maven org.xwiki.commons:xwiki-commons-xml (Maven)

Affected versions

>= 3.1-milestone-1, < 13.10.9
>= 14.0-rc-1, < 14.4.4
>= 14.5, < 14.7-rc-1

Patched versions

13.10.9
14.4.4
14.7-rc-1

Description

Impact

Any user can edit his own profile and inject code which is going to be executed with programming right.

Steps to reproduce:

  • Set your first name to
    {{cache id="userProfile"}}{{groovy}}println("Hello from groovy!"){{/groovy}}{{/cache}}

The first name appears as interpreted "Hello from groovy" instead of the expected fully escaped "{{cache id="userProfile"}}{{groovy}}println("Hello from groovy!"){{/groovy}}{{/cache}}".

The same vulnerability can also be exploited in all other places where short text properties are displayed, e.g., in apps created using Apps Within Minutes that use a short text field.

Patches

The problem has been patched on versions 13.10.9, 14.4.4, 14.7RC1.

Workarounds

There are no other workarounds than upgrading XWiki or patching the xwiki-commons-xml JAR file.

References

For more information

If you have any questions or comments about this advisory:

References

@tmortagne tmortagne published to xwiki/xwiki-commons Mar 1, 2023
Published by the National Vulnerability Database Mar 2, 2023
Published to the GitHub Advisory Database Mar 3, 2023
Reviewed Mar 3, 2023
Last updated Mar 3, 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

0.332%
(72nd percentile)

Weaknesses

CVE ID

CVE-2023-26055

GHSA ID

GHSA-8cw6-4r32-6r3h

Source code

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