IBM Web Server Plug-ins for WebSphere Application Server and WebSphere Liberty 8.5, 9.0 IBM WebSphere Application Server and WebSphere Application Server Liberty are vulnerable to remote code execution in the Web Server Plug-ins, through a specially crafted request.
IBM strongly recommends addressing the vulnerability now by applying a currently available Web Server Plug-ins interim fix or fix pack that contains the fix for APAR PH71342.
Web Server Plug-ins for IBM WebSphere Application Server (used with either WebSphere Application Server traditional or Liberty):
For V9.0.0.0 through 9.0.5.27:
· Upgrade to minimal fix pack levels as required by the interim fix and then apply the Web Server Plug-ins Interim Fix that resolves PH71342 https://www.ibm.com/support/pages/node/7273976
--OR--
· Apply Web Server Plug-ins Fix Pack 9.0.5.28 or later (targeted availability 2Q2026).
For V8.5.0.0 through 8.5.5.29:
· Upgrade to minimal fix pack levels as required by interim fix and then apply Web Server Plug-ins Interim Fix that resolves PH71342 https://www.ibm.com/support/pages/node/7273976
--OR--
· Apply Web Server Plug-ins Fix Pack 8.5.5.30 or later (targeted availability 3Q2026).
Additional interim fixes may be available and linked off the interim fix download page.