CVE-2023-29516: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

April 20, 2023

XWiki Platform is a generic wiki platform offering runtime services for applications built on top of it. Any user with view rights on XWiki.AttachmentSelector can execute arbitrary Groovy, Python or Velocity code in XWiki leading to full access to the XWiki installation. The root cause is improper escaping in the “Cancel and return to page” button. This page is installed by default. This vulnerability has been patched in XWiki 15.0-rc-1, 14.10.1, 14.4.8, and 13.10.11. There are no known workarounds for this vulnerability.

References

github.com/advisories/GHSA-3989-4c6x-725f
github.com/xwiki/xwiki-platform/commit/aca1d677c58563bbe6e35c9e1c29fd8b12ebb996
github.com/xwiki/xwiki-platform/security/advisories/GHSA-3989-4c6x-725f
jira.xwiki.org/browse/XWIKI-20275
nvd.nist.gov/vuln/detail/CVE-2023-29516

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