The mail message display page in SquirrelMail through 1.4.22 has XSS via a "<math><maction xlink:href=" attack.
This issue affects the versions of squirrelmail as shipped with Red Hat Enterprise Linux 5. Red Hat Enterprise Linux 5 is now in Extended Life Phase of the support and maintenance life cycle. This issue is not currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.
Created squirrelmail tracking bugs for this issue:
Affects: epel-all [bug 1616091]
Affects: fedora-all [bug 1616090]