CVE-2023-29211

Description

### Impact Any user with view rights `WikiManager.DeleteWiki` can execute arbitrary Groovy, Python or Velocity code in XWiki leading to full access to the XWiki installation. The root cause is improper escaping of the `wikiId` url parameter. A proof of concept exploit is to open <xwiki-host>/xwiki/bin/view/WikiManager/DeleteWiki?wikiId=%22+%2F%7D%7D+%7B%7Basync+async%3D%22true%22+cached%3D%22false%22+context%3D%22doc.reference%22%7D%7D%7B%7Bgroovy%7D%7Dprintln%28%22Hello+from+groovy%21%22%29%7B%7B%2Fgroovy%7D%7D%7B%7B%2Fasync%7D%7D where <xwiki-host> is the URL of your XWiki installation. ### Patches The problem has been patched on XWiki 13.10.11, 14.4.7, and 14.10. ### Workarounds The issue can be fixed manually applying this [patch](https://github.com/xwiki/xwiki-platform/commit/ba4c76265b0b8a5e2218be400d18f08393fe1428#diff-64f39f5f2cc8c6560a44e21a5cfd509ef00e8a2157cd9847c9940a2e08ea43d1R63-R64). If you have any questions or comments about this advisory: * Open an issue in [Jira XWiki.org](https://jira.xwiki.org/) * Email us at [Security Mailing List](mailto:security@xwiki.org)

How to fix CVE-2023-29211

To remediate CVE-2023-29211, upgrade the affected package to a fixed version below.

—upgrade to 13.10.11 or later

Is CVE-2023-29211 being exploited?

Moderate — EPSS is 7.8%. Track this CVE but it's not at the top of the prioritisation list.

Affected packages (1)

>= 5.3-milestone-2, < 13.10.11

CVSS scores

Source	Version	Severity	Vector
osv	CVSS 3.1	CRITICAL9.9	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H