Home/CVE/XWiki Platform is a generic wiki platform offering runtime services for applications built on top of it. In affected ver
CVE

CVE-2021-21379

XWiki Platform is a generic wiki platform offering runtime services for applications built on top of it. In affected ver

XWiki Platform is a generic wiki platform offering runtime services for applications built on top of it. In affected versions of XWiki Platform, the {{wikimacrocontent}} executes the content with the rights of the wiki macro author instead of the caller of that wiki macro. This makes possible to inject scripts through it and they will be executed with the rights of the wiki macro (very often a user which has Programming rights).

Fortunately, no such macro exists by default in XWiki Standard but one could have been created or installed with an extension. This vulnerability has been patched in versions XWiki 12.6.3, 11.10.11 and 12.8-rc-1. There is no easy workaround other than disabling the affected macros.

Inserting content in a safe way or knowing what is the user who called the wiki macro is not easy.

HIGH · CVSS 7.7 EPSS 0.00442
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-281Improper Preservation of Permissions
▤

Affected Products & Versions

3
xwiki>= 11.4 and < 11.10.11
xwiki>= 12.0 and < 12.6.3
xwiki>= 12.7 and <= 12.7.1
▤

Affected Packages

1
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
Maven org.xwiki.platform:xwiki-platform-rendering-wikimacro-store LOW fixed in 11.10.11
▣

Scoring & Timeline

7.7
HIGH · CVSS v3.1 · security-advisories@github.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD12 Mar 2021 · 06:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N
🔗

References & Sources

2
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-v662-xpcc-9xf6Third Party Advisory
https://jira.xwiki.org/browse/XWIKI-17759Vendor Advisory
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