Vulnerability · Published Jun 29, 2023 · Assigned by GitHub_M
CVE-2023-36470Code injection in icon themes of XWiki Platform
Critical 10.0
In plain English
A critical-severity injection in xwiki-platform from xwiki. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 1.9% (higher than 80% 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. By either creating a new or editing an existing document with an icon set, an attacker can inject XWiki syntax and Velocity code that is executed with programming rights and thus allows remote code execution. There are different attack vectors, the simplest is the Velocity code in the icon set's HTML or XWiki syntax definition. The [icon picker](https://extensions.xwiki.org/xwiki/bin/view/Extension/Icon%20Theme%20Application#HIconPicker) can be used to trigger the rendering of any icon set. The XWiki syntax variant of the icon set is also used without any escaping in some documents, allowing to inject XWiki syntax including script macros into a document that might have programming right, for this the currently used icon theme needs to be edited. Further, the HTML output of the icon set is output as JSON in the icon picker and this JSON is interpreted as XWiki syntax, allowing again the injection of script macros into a document with programming right and thus allowing remote code execution. This impacts the confidentiality, integrity and availability of the whole XWiki instance. This issue has been patched in XWiki 14.10.6 and 15.1. Icon themes now require script right and the code in the icon theme is executed within the context of the icon theme, preventing any rights escalation. A macro for displaying icons has been introduced to avoid injecting the raw wiki syntax of an icon set into another document. Users are advised to upgrade. There are no known workarounds for this vulnerability.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Maven | org.xwiki.platform:xwiki-platform-icon-default | 14.10.6 | GHSA-fm68-j7ww-h9xf |
| Maven | org.xwiki.platform:xwiki-platform-icon-default | 15.2-rc-1 | GHSA-fm68-j7ww-h9xf |
| Maven | org.xwiki.platform:xwiki-platform-icon-script | 14.10.6 | GHSA-fm68-j7ww-h9xf |
| Maven | org.xwiki.platform:xwiki-platform-icon-script | 15.2-rc-1 | GHSA-fm68-j7ww-h9xf |
| Maven | org.xwiki.platform:xwiki-platform-icon-ui | 14.10.6 | GHSA-fm68-j7ww-h9xf |
| Maven | org.xwiki.platform:xwiki-platform-icon-ui | 15.2-rc-1 | GHSA-fm68-j7ww-h9xf |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| xwiki | xwiki-platform | >= 6.2-milestone-1, < 14.10.6 |
Weakness: CWE-74 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
References
- https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-fm68-j7ww-h9xf x_refsource_CONFIRM
- https://github.com/xwiki/xwiki-platform/commit/46b542854978e9caa687a5c2b8817b8b17877d94 x_refsource_MISC
- https://github.com/xwiki/xwiki-platform/commit/79418dd92ca11941b46987ef881bf50424898ff4 x_refsource_MISC
- https://github.com/xwiki/xwiki-platform/commit/b0cdfd893912baaa053d106a92e39fa1858843c7 x_refsource_MISC
- https://jira.xwiki.org/browse/XWIKI-20524 x_refsource_MISC