XScreenSaver Local Password Disclosure Vulnerability Solution:
The vendor has released version 4.18 of XScreenSaver to address this issue.
Please see the referenced vendor advisories for more information on obtaining and applying fixes.
Jamie Zawinski XScreenSaver 4.14
Jamie Zawinski XScreenSaver 4.16
Jamie Zawinski XScreenSaver 4.17
Jamie Zawinski XScreenSaver 4.15