CVE-2023-28962: An Improper Authentication vulnerability in upload-file.php, used by the J-Web component of Juniper Networks Junos OS allows an unauthenticated, network-based…

PriorityP264critical9.8CVSS 3.1

AVNACLPRNUINSUCHIHAH

EPSS

0.56%

42.8th percentile

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

27 ranges· showing 25

Vendor	Product	Version range	Fixed in
juniper	j-web	—	—
juniper	junos	< 19.4	19.4
juniper	junos	—	—
juniper	junos	—	—
juniper	junos	—	—
juniper	junos	—	—
juniper	junos	—	—
juniper	junos	—	—
juniper	junos	—	—
juniper	junos	—	—
juniper	junos	—	—
juniper	junos	—	—
juniper	junos	—	—
juniper	junos	—	—
juniper	junos_os	—	—
juniper_networks	junos_os	>= 20.1R1 < 20.1*	20.1*
juniper_networks	junos_os	>= 20.2 < 20.2R3-S7	20.2R3-S7
juniper_networks	junos_os	>= 20.3R1 < 20.3*	20.3*
juniper_networks	junos_os	>= 20.4 < 20.4R3-S6	20.4R3-S6
juniper_networks	junos_os	>= 21.1R1 < 21.1*	21.1*
juniper_networks	junos_os	>= 21.2 < 21.2R3-S4	21.2R3-S4
juniper_networks	junos_os	>= 21.3 < 21.3R3-S3	21.3R3-S3
juniper_networks	junos_os	>= 21.4 < 21.4R3-S3	21.4R3-S3
juniper_networks	junos_os	>= 22.1 < 22.1R3-S1	22.1R3-S1
juniper_networks	junos_os	>= 22.2 < 22.2R2-S1, 22.2R3	22.2R2-S1, 22.2R3

Detection & IOCsextracted from sources · hover to see the quote

→Monitor for unauthenticated HTTP requests targeting the upload-file.php endpoint of the J-Web component, which allows arbitrary file uploads to temporary folders without authentication. ↗

·The vulnerable endpoint upload-file.php is part of the J-Web component. Disabling or restricting access to J-Web (e.g., via firewall filters) reduces exposure. Affected versions span a wide range — verify patched versions per branch before relying on version-based detection. ↗

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