HP LaserJet Credential Disclosure / Missing Authentication

`Some of the networked HP LaserJet printers have hidden URLs hardcoded in the firmware. The URLs are not authenticated and can be used to extract admin password in plaintext – among other information like WiFi settings (including WPS PIN).  
  
Models affected:  
  
HP LaserJet Pro P1102w, HP LaserJet Pro P1606dn, HP LaserJet Pro CP1025nw, HP LaserJet Pro M1212nf MFP, HP LaserJet Pro M1213nf MFP, HP LaserJet Pro M1214nfh MFP, HP LaserJet Pro M1216nfh MFP, HP LaserJet Pro M1217nfw MFP, HP LaserJet Pro M1218nfs MFP, Possibly others(?)  
  
URLs details:  
  
Here are at least two interesting URLs, which can be accessed without authentication:  
  
http://IP_ADDRESS/dev/save_restore.xml  
(gives admin password/configuration parameters in plaintext)  
  
http://IP_ADDRESS:8080/IoMgmt/Adapters/wifi0/WPS/Pin  
(gives WPS PIN in plaintext)  
  
Original disclosure:  
http://sekurak.pl/hp-laserjet-pro-printers-remote-admin-password-extraction/  
  
Original information from HP:  
https://h20566.www2.hp.com/portal/site/hpsc/template.PAGE/public/kb/docDisplay/?javax.portlet.begCacheTok=com.vignette.cachetoken&javax.portlet.endCacheTok=com.vignette.cachetoken&javax.portlet.prp_ba847bafb2a2d782fcbb0710b053ce01=wsrp-navigationalState%3DdocId%253Demr_na-c03825817-1%257CdocLocale%253D%257CcalledBy%253D&javax.portlet.tpst=ba847bafb2a2d782fcbb0710b053ce01&ac.admitted=1375697666155.876444892.199480143  
  
History  
  
19.04.2013 vendor notified  
19.04.2013 initial vendor response received  
24.04.2013 issue confirmed  
26.07.2013 new firmwares released  
31.07.2013 issues summary published by vendor  
02.08.2013 disclosure  
  
--  
Michal Sajdak, Securitum  
`