Ecosyste.ms: Advisories

Security Advisories: GSA_kwCzR0hTQS12MnJyLXh3OTUtd2NqeM4AA2sE

Privilege escalation (PR)/remote code execution from account through Menu.UIExtensionSheet

Impact

Any user who can edit their own user profile 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. As an advanced user, use the object editor to add an object of type UIExtensionClass to your user profile. Set the value "Extension Point ID" to {{/html}}{{async async=false cache=false}}{{groovy}}println("Hello from Groovy!"){{/groovy}}{{/async}}
2. Open <xwiki-host>/xwiki/bin/edit/XWiki/<username>?sheet=Menu.UIExtensionSheet where <xwiki-host> is the URL of your XWiki installation and <username> is your user name.

If the text Hello from Groovy!" selected="selected"> is displayed in the output, the attack succeeded.

Patches

This has been patched in XWiki 14.10.8 and 15.3 RC1 by adding proper escaping.

Workarounds

The patch can be manually applied to the document Menu.UIExtensionSheet, only three lines need to be changed.

References

• https://jira.xwiki.org/browse/XWIKI-20746
• https://github.com/xwiki/xwiki-platform/commit/9e8f080094333dec63a8583229a3799208d773be

Permalink: https://github.com/advisories/GHSA-v2rr-xw95-wcjx
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS12MnJyLXh3OTUtd2NqeM4AA2sE
Source: GitHub Advisory Database
Origin: Unspecified
Severity: High
Classification: General
Published: 7 months ago
Updated: 6 months ago

CVSS Score: 8.8
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Identifiers: GHSA-v2rr-xw95-wcjx, CVE-2023-37909
References:

• https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-v2rr-xw95-wcjx
• https://nvd.nist.gov/vuln/detail/CVE-2023-37909
• https://github.com/xwiki/xwiki-platform/commit/9e8f080094333dec63a8583229a3799208d773be
• https://jira.xwiki.org/browse/XWIKI-20746
• https://github.com/advisories/GHSA-v2rr-xw95-wcjx

Repository: https://github.com/xwiki/xwiki-platform
Blast Radius: 1.0

Affected Packages