An updated wordpress-shibboleth package has been released for Debian 7 LTS

Package : wordpress-shibboleth
Version : 1.4-2+deb7u1
CVE ID : CVE-2017-14313
Debian Bug : #874416

It was discovered that there was a an XSS vulnerability in the login form of
the "Shibboleth" identity provider module for Wordpress.

For Debian 7 "Wheezy", this issue has been fixed in wordpress-shibboleth version
1.4-2+deb7u1.

We recommend that you upgrade your wordpress-shibboleth packages.