CVE-2025-55727: RCE in XWiki Remote Macros

The impact of CVE-2025-55727 is severe. An attacker can leverage the unescaped 'width' parameter in the column macro to inject XWiki syntax, ultimately leading to remote code execution. This can occur for any user with edit permissions on a page or those who can access the CKEditor converter. Crucially, if the macro has been installed by a user with programming rights, or even if the attacker can execute Velocity code as the wiki admin, the attacker gains full control over the server. This allows for data exfiltration, system compromise, and potentially lateral movement within the network. The ability to execute code as the wiki admin significantly expands the blast radius, potentially impacting all data and services hosted within the XWiki environment. This vulnerability shares similarities with other syntax injection vulnerabilities where improper input validation leads to code execution.

1. Reserved2025-08-14
2. Published2025-09-09
3. Modified2025-09-10
4. EPSS updated2026-03-23

The primary mitigation for CVE-2025-55727 is to upgrade XWiki Remote Macros to version 1.26.5 or later. If an immediate upgrade is not feasible, consider implementing temporary workarounds. Restrict user permissions to limit who can edit pages and access the CKEditor converter. Implement strict input validation on all user-supplied data, particularly the 'width' parameter, to prevent XWiki syntax injection. Consider using a Web Application Firewall (WAF) to filter out malicious requests containing suspicious syntax. Monitor XWiki logs for any unusual activity or attempts to exploit the vulnerability. If you suspect a compromise, immediately isolate the affected system and conduct a thorough forensic investigation. After upgrading, confirm the fix by attempting to inject XWiki syntax through the column macro and verifying that the input is properly sanitized.