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CVE-2023-28962

Junos OS: Unauthenticated access vulnerability in J-Web

Medium5.3EPSS 0.56%
Published
Updated
Reserved
Assigned by
juniper

Description

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.

Timeline

  1. ID reserved

    By juniper

  2. · 19 days later

    Published

  3. · 22 months later

    Record updated

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2023-28962, by who scored it
Scored byCVSSScoreVector
juniperCNA (assigner)3.1Medium5.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
NVDNVD · Modified3.1Critical9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (exploitation in 30 days)
0.56% · top 53% of all CVEs (7 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: yes · Technical impact: partial
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.3.

Weakness

Affected products

  • Juniper Networks · Junos OS

    • affected unspecified – < 19.4R3-S11
    • affected 20.1R1 – < 20.1*
    • affected 20.2 – < 20.2R3-S7
    • affected 20.3R1 – < 20.3*
    • affected 20.4 – < 20.4R3-S6
    • affected 21.1R1 – < 21.1*
    • affected 21.2 – < 21.2R3-S4
    • affected 21.3 – < 21.3R3-S3
    • affected 21.4 – < 21.4R3-S3
    • affected 22.1 – < 22.1R3-S1
    • affected 22.2 – < 22.2R2-S1, 22.2R3
    • affected 22.3 – < 22.3R1-S2, 22.3R2

What to do

Solution: The following software releases have been updated to resolve this specific issue: Junos OS 19.4R3-S11, 20.2R3-S7, 20.4R3-S6, 21.2R3-S4, 21.3R3-S3, 21.4R3-S3, 22.1R3-S1, 22.2R2-S1, 22.2R3, 22.3R1-S2, 22.3R2, 22.4R1, 22.4R2, 23.1R1, and all subsequent releases.

Workaround: Disable J-Web, or limit access to only trusted hosts.

Exploitation: Juniper SIRT is not aware of any malicious exploitation of this vulnerability.

References (1)

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .