Advisory Weakness Curation

XWiki Platform vulnerable to privilege escalation from view right using Invitation.InvitationCommon ### Impact Any user with view rights 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 `Invitation.InvitationCommon`. This page is installed by default. See https://jira.xwiki.org/browse/XWIKI-20283 for the reproduction steps. ### Patches The vulnerability has been patched in XWiki 15.0-rc-1, 14.10.1, 14.4.8, and 13.10.11. ### Workarounds The issue can be fixed by applying this patch https://github.com/xwiki/xwiki-platform/commit/3d055a0a5ec42fdebce4d71ee98f94553fdbfebf on `Invitation.InvitationCommon`. ### References - https://github.com/xwiki/xwiki-platform/commit/3d055a0a5ec42fdebce4d71ee98f94553fdbfebf - https://jira.xwiki.org/browse/XWIKI-20283 ### For more information 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)

Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') XWiki Platform is a generic wiki platform offering runtime services for applications built on top of it. Any user with view rights 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 `Invitation.InvitationCommon`. This page is installed by default. The vulnerability has been patched in XWiki 15.0-rc-1, 14.10.1, 14.4.8, and 13.10.11. Users are advised to upgrade. There are no known workarounds for this issue.