Vulnerability · Published Mar 12, 2021 · Assigned by GitHub_M
CVE-2021-21379It's possible to execute anything with the rights of the author of a macro which uses the {{wikimacrocontent}} macro
High 7.7
In plain English
A high-severity security flaw in xwiki-platform from xwiki. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 41% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Maven | org.xwiki.platform:xwiki-platform-rendering-wikimacro-store | 11.10.11 | GHSA-v662-xpcc-9xf6 |
| Maven | org.xwiki.platform:xwiki-platform-rendering-wikimacro-store | 12.6.3 | GHSA-v662-xpcc-9xf6 |
| Maven | org.xwiki.platform:xwiki-platform-rendering-wikimacro-store | 12.8 | GHSA-v662-xpcc-9xf6 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| xwiki | xwiki-platform | >= 11.4.0, < 11.10.11>= 12.0.0, < 12.6.3>= 12.7.0, < 12.8-rc-1 |
Weakness: CWE-281 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N
References
- https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-v662-xpcc-9xf6 x_refsource_CONFIRM
- https://jira.xwiki.org/browse/XWIKI-17759 x_refsource_MISC