Known Vulnerabilities

The following vulnerabilities are known to exist in Liferay Portal CE.  Users of older releases are strongly encouraged to upgrade to the latest Liferay Portal CE release.  Patches are only produced for the latest Liferay Portal CE release.  Source code modifications may be possible on older releases, but care must be taken to backport fixes that may not apply to older releases.

To obtain source or binary patches for each of the vulnerabilities, click on the name of the vulnerability, and look for links for source and binary patches.  To obtain a single cumulative source or binary patch for all known vulnerabilities, visit the Patch Details section of the Reporting page.  Note that the availability of the single cumulative binary patch may lag a day or two behind availability of the associated source patches.


CST-7051 Remote code execution via Web Proxy application


Tue, 29 May 2018 04:00:00 +0000


CST-7051 Remote code execution via Web Proxy application


The Web Proxy portlet/application allows remote attackers to execute arbitrary code via supplied stylesheet.

Patched versions of the portal will prevent users without the administrator role from adding the Web Proxy application to a page by default only in new installations. For existing installations, please refer to the workaround section below.


Severity 1


Portal administrators should review users with permission to add and configure the Web Proxy portlet/application. Permission to configure Web Proxy should be removed from any user who is not trusted.

  1. Navigate to Control Panel > Configuration > Components > Portlets
  2. Locate and click on "Web Proxy"
  3. Locate the "Permissions" section
  4. Click on "Change" and remove the "Add to Page" permission from any role with users who are not trusted.
    In most installations of Liferay DXP/Liferay Portal, the "Add to Page" permission should only be given to users with the "Administrator" role.


There is no patch available for Liferay Portal 7.0 CE GA6. Instead, users should upgrade to Liferay Portal 7.0 CE GA7 (7.0.6) or later to fix this issue.

Vulnerabilities archive for past releases: 6.1 CE | 6.2 CE | 7.0 CE

Additional Known Vulnerabilities

Liferay Portal Liferay Faces