CVE-2023-28962: Juniper Junos

Critical severity, CVSS 9.8. EPSS: 0.6% chance of exploitation in the next 30 days.

An Improper Authentication vulnerability in upload-file.php, used by the J-Web component of Juniper Networks Junos OS allows an unauthenticated, network-based attacker to upload arbitrary files to temporary folders on the device. This issue affects Juniper Networks Junos OS: All versions prior to 19.4R3-S11; 20.1 version 20.1R1 and later versions; 20.2 versions prior to 20.2R3-S7; 20.3 version 20.3R1 and later versions; 20.4 versions prior to 20.4R3-S6; 21.1 version 21.1R1 and later versions; 21.2 versions prior to 21.2R3-S4; 21.3 versions prior to 21.3R3-S3; 21.4 versions prior to 21.4R3-S3; 22.1 versions prior to 22.1R3-S1; 22.2 versions prior to 22.2R2-S1, 22.2R3; 22.3 versions prior to 22.3R1-S2, 22.3R2.

Affected products

• Juniper Junos: before 19.4 (fixed in 19.4); version 19.4 only; version 20.1 only; version 20.2 only; version 20.3 only; version 20.4 only; …

Published 2023-04-17. Last modified 2026-06-17.