The Open Connectivity Foundation UPnP specification before 2020-04-17 does not forbid the acceptance of a subscription request with a delivery URL on a different network segment than the fully qualified event-subscription URL, aka the CallStranger issue.

A potential security vulnerability has been identified with certain HP InkJet printers. The vulnerability could be exploited to allow cross-site scripting (XSS). Affected products and versions include: HP DeskJet 2600 All-in-One Printer series model numbers 4UJ28B, V1N01A - V1N08A, Y5H60A - Y5H80A; HP DeskJet Ink Advantage 2600 All-in-One Printer series model numbers V1N02A - V1N02B, Y5Z00A - Y5Z04B; HP DeskJet Ink Advantage 5000 All-in-One Printer series model numbers M2U86A - M2U89B; HP DeskJet Ink Advantage 5200 All-in-One Printer series model numbers M2U76A - M2U78B; HP ENVY 5000 All-in-One Printer series model numbers M2U85A - M2U85B, M2U91A - M2U94B, Z4A54A - Z4A74A; HP ENVY Photo 6200 All-in-One Printer series model numbers K7G18A-K7G26B, K7S21B, Y0K13D - Y0K15A; HP ENVY Photo 7100 All-in-One Printer series model numbers 3XD89A, K7G93A-K7G99A, Z3M37A - Z3M52A; HP ENVY Photo 7800 All-in-One Printer series model numbers K7R96A, K7S00A - K7S10D, Y0G42D - Y0G52B; HP Ink Tank Wirele…