Vulnerability · Published Apr 20, 2023 · Assigned by GitHub_M
CVE-2023-29528Cross-site Scripting in org.xwiki.commons:xwiki-commons-xml
Critical 9.1
In plain English
A critical-severity cross-site scripting in xwiki-commons from xwiki. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.3% (higher than 70% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Fixed versions are available - upgrade the affected package.
Official description
XWiki Commons are technical libraries common to several other top level XWiki projects. The "restricted" mode of the HTML cleaner in XWiki, introduced in version 4.2-milestone-1 and massively improved in version 14.6-rc-1, allowed the injection of arbitrary HTML code and thus cross-site scripting via invalid HTML comments. As a consequence, any code relying on this "restricted" mode for security is vulnerable to JavaScript injection ("cross-site scripting"/XSS). When a privileged user with programming rights visits such a comment in XWiki, the malicious JavaScript code is executed in the context of the user session. This allows server-side code execution with programming rights, impacting the confidentiality, integrity and availability of the XWiki instance. This problem has been patched in XWiki 14.10, HTML comments are now removed in restricted mode and a check has been introduced that ensures that comments don't start with `>`. There are no known workarounds apart from upgrading to a version including the fix.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Maven | org.xwiki.commons:xwiki-commons-xml | 14.10 | GHSA-x37v-36wv-6v6h |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| xwiki | xwiki-commons | >= 4.2-milestone-1, < 14.10 |
Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
References
- https://github.com/xwiki/xwiki-commons/security/advisories/GHSA-x37v-36wv-6v6h x_refsource_CONFIRM
- https://github.com/xwiki/xwiki-commons/commit/8ff1a9d7e5d7b45b690134a537d53dc05cae04ab x_refsource_MISC
- https://jira.xwiki.org/browse/XCOMMONS-2568 x_refsource_MISC
- https://jira.xwiki.org/browse/XWIKI-20348 x_refsource_MISC