A Cross-site Scripting (XSS) vulnerability in Juniper Networks Junos OS J-Web allows an attacker to construct a URL that when visited by another user enables the attacker to execute commands with the target's permissions, including an administrator. This issue affects: Juniper Networks Junos OS 12.3 versions prior to 12.3R12-S19.

15.1 versions prior to 15.1R7-S10.

18.3 versions prior to 18.3R3-S5.

18.4 versions prior to 18.4R2-S10, 18.4R3-S9.

19.1 versions prior to 19.1R2-S3, 19.1R3-S6.

19.2 versions prior to 19.2R1-S8, 19.2R3-S3.

19.3 versions prior to 19.3R2-S6, 19.3R3-S3.

19.4 versions prior to 19.4R3-S5.

20.1 versions prior to 20.1R3-S2.

20.2 versions prior to 20.2R3-S2.

20.3 versions prior to 20.3R3.

20.4 versions prior to 20.4R2-S2, 20.4R3.

21.1 versions prior to 21.1R1-S1, 21.1R2.

21.2 versions prior to 21.2R1-S1, 21.2R2.