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Security Advisories: GSA_kwCzR0hTQS02MnByLXFxZjctaGg4Oc4AA2_Q

XWiki Platform vulnerable to remote code execution through the section parameter in Administration as guest

Impact

XWiki doesn't properly escape the section URL parameter that is used in the code for displaying administration sections. This allows any user with read access to the document XWiki.AdminSheet (by default, everyone including unauthenticated users) to execute code including Groovy code. This impacts the confidentiality, integrity and availability of the whole XWiki instance.

By opening the URL <server>/xwiki/bin/get/Main/WebHome?sheet=XWiki.AdminSheet&viewer=content&section=%5D%5D%7B%7B%2Fhtml%7D%7D%7B%7Basync%7D%7D%7B%7Bgroovy%7D%7Dservices.logging.getLogger(%22attacker%22).error(%22Attack%20succeeded!%22)%7B%7B%2Fgroovy%7D%7D%7B%7B%2Fasync%7D%7D&xpage=view where <server> is the URL of the XWiki installation, it can be tested if an XWiki installation is vulnerable. If this causes a log message ERROR attacker - Attack succeeded! to appear in XWiki's log, the installation is vulnerable. In very old versions of XWiki, the attack can be demonstrated with <server>/xwiki/bin/get/XWiki/XWikiPreferences?section=%3C%25println(%22Hello%20from%20Groovy%22)%25%3E&xpage=view which displays admin.hello from groovy as title when the attack succeeds (tested on XWiki 1.7).

Patches

This vulnerability has been patched in XWiki 14.10.14, 15.6 RC1 and 15.5.1.

Workarounds

The fix, which consists of replacing = $services.localization.render("administration.sectionTitle$level", [$sectionName]) = by = $services.localization.render("administration.sectionTitle$level", 'xwiki/2.1', [$sectionName]) =, can be applied manually to the document XWiki.AdminSheet.

References

• https://jira.xwiki.org/browse/XWIKI-21110
• https://github.com/xwiki/xwiki-platform/commit/fec8e0e53f9fa2c3f1e568cc15b0e972727c803a

Permalink: https://github.com/advisories/GHSA-62pr-qqf7-hh89
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS02MnByLXFxZjctaGg4Oc4AA2_Q
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Critical
Classification: General
Published: about 1 year ago
Updated: about 1 year ago

CVSS Score: 10.0
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

EPSS Percentage: 0.00389
EPSS Percentile: 0.72932

Identifiers: GHSA-62pr-qqf7-hh89, CVE-2023-46731
References:

• https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-62pr-qqf7-hh89
• https://nvd.nist.gov/vuln/detail/CVE-2023-46731
• https://github.com/xwiki/xwiki-platform/commit/fec8e0e53f9fa2c3f1e568cc15b0e972727c803a
• https://github.com/xwiki/xwiki-platform/commit/fec8e0e53f9fa2c3f1e568cc15b0e972727c803a#diff-6271f9be501f30b2ba55459eb451aee3413d34171ba8198a77c865306d174e23
• https://jira.xwiki.org/browse/XWIKI-21110
• https://github.com/advisories/GHSA-62pr-qqf7-hh89

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

Affected Packages