9.9

CVSS Score

3.1

-

CVSS Score

Basic Information

CVE ID

CVE-2023-30537

GHSA ID

GHSA-vrr8-fp7c-7qgp

EPSS Score

0.83504%

CWE

CWE-94

Published

4/12/2023

Updated

5/5/2023

KEV Status

Technology

Java

Basic Information

CVE ID

GHSA ID

EPSS Score

CWE

Published

Updated

KEV Status

Technology

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CVE-2023-30537

CVE-2023-30537: org.xwiki.platform:xwiki-platform-flamingo-theme-ui vulnerable to privilege escalation

Impact

Any user with the right to add an object on a page can execute arbitrary Groovy, Python or Velocity code in XWiki leading to full access to the XWiki installation. The root cause is improper escaping of the styles properties FlamingoThemesCode.WebHome. This page is installed by default.

Reproduction Steps

Steps to reproduce:

As a user without script or programming rights, edit your user profile with the object editor (enable advanced mode if necessary to get access) and add an object of type "Theme Class" of "FlamingoThemesCode". In the field "body-bg" (all other fields should work, too) add the following text:

{{/html}} {{async async="true" cached="false" context="doc.reference"}}{{groovy}}println("Hello " + "from groovy!"){{/groovy}}{{/async}}

Click "Save & View"
Open <xwiki-host>/xwiki/bin/view/FlamingoThemesCode/WebHomeSheet where <xwiki-host> is the URL of your XWiki installation

Expected result:

The list of color themes either doesn't include the user's profile or displays a regular preview.

Actual result:

The user's profile is listed as color theme but instead of the little preview the message

Failed to execute the [html] macro. Cause: [When using HTML content inline, you can only use inline HTML content. Block HTML content (such as tables) cannot be displayed. Try leaving an empty line before and after the macro.]. Click on this message for details.
Hello from groovy!">

is displayed. This shows that a Groovy macro with content created by the user has been executed and thus demonstrates a privilege escalation from simple user account to programming rights.

Patches

The vulnerability has been patched in XWiki 13.10.11, 14.4.7 and 14.10.

Workarounds

The issue can be fixed by applying this patch on FlamingoThemesCode.WebHomeSheet.

References

patch: https://github.com/xwiki/xwiki-platform/commit/df596f15368342236f8899ca122af8f3df0fe2e8
Jira: https://jira.xwiki.org/browse/XWIKI-20280

For more information

If you have any questions or comments about this advisory:

Open an issue in Jira XWiki.org
Email us at Security Mailing List

(GitHub Advisory)

Miggo Vulnerability Database

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CVE-2023-30537

CVE-2023-30537:

9.9

CVSS Score

3.1

-

CVSS Score

Basic Information

CVE ID

CVE-2023-30537

GHSA ID

GHSA-vrr8-fp7c-7qgp

EPSS Score

0.83504%

CWE

CWE-94

Published

4/12/2023

Updated

5/5/2023

KEV Status

Technology

Java

Basic Information

CVE ID

GHSA ID

EPSS Score

CWE

Published

Updated

KEV Status

Technology

Technical Details

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L

Package Name	Ecosystem	Vulnerable Versions	First Patched Version
org.xwiki.platform:xwiki-platform-flamingo-theme-ui	maven	>= 12.6.6, < 13.10.11	13.10.11
org.xwiki.platform:xwiki-platform-flamingo-theme-ui	maven	>= 14.0-rc-1, < 14.4.7	14.4.7
org.xwiki.platform:xwiki-platform-flamingo-theme-ui	maven	>= 14.5, < 14.10	14.10

Technical Details

Vulnerability Intelligence
Miggo AI

Root Cause Analysis

The vulnerability stems from unescaped output of user-controlled values in Velocity templates. The commit diff shows critical additions of $services.rendering.escape and $escapetool.xml() around previously unescaped variables like $themeDoc.displayTitle and $value. These variables were populated from theme properties editable by users, enabling code injection when rendered without proper escaping. The #displayStyleProperty macro's direct output of $value was particularly vulnerable as it handled style properties containing attack payloads.

Vulnerable functions

Only Mi**o us*rs **n s** t*is s**tion

WAF Protection Rules

WAF Rule

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Reasoning

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9.9

-

Basic Information

Basic Information

Concerned about an active attack path?

CVE-2023-30537: org.xwiki.platform:xwiki-platform-flamingo-theme-ui vulnerable to privilege escalation

Impact

Reproduction Steps

Patches

Workarounds

References

For more information

CVE-2023-30537:

9.9

-

Basic Information

Basic Information

Technical Details

Technical Details

Vulnerability IntelligenceMiggo AI

Root Cause Analysis

Vulnerable functions

WAF Protection Rules

WAF Rule

Reasoning

Vulnerability IntelligenceMiggo AI

9.9

9.9

Technical Details

Basic Information

Basic Information

Vulnerability IntelligenceMiggo AI

Root Cause Analysis

Vulnerable functions

WAF Protection Rules

WAF Rule

Reasoning

CVE-2023-30537: org.xwiki.platform:xwiki-platform-flamingo-theme-ui vulnerable to privilege escalation

Impact

Reproduction Steps

Patches

Workarounds

References

For more information

Vulnerability Intelligence
Miggo AI

Vulnerability Intelligence
Miggo AI

Vulnerability Intelligence
Miggo AI