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CVE-2019-0047

Junos OS: Persistent XSS vulnerability in J-Web

High8.8EPSS 1.6%
Published
Updated
Reserved
Assigned by
juniper

Description

A persistent Cross-Site Scripting (XSS) vulnerability in Junos OS J-Web interface may allow remote unauthenticated attackers to perform administrative actions on the Junos device. Successful exploitation requires a Junos administrator to first perform certain diagnostic actions on J-Web. This issue affects: Juniper Networks Junos OS 12.1X46 versions prior to 12.1X46-D86; 12.3 versions prior to 12.3R12-S13; 12.3X48 versions prior to 12.3X48-D80; 14.1X53 versions prior to 14.1X53-D51; 15.1 versions prior to 15.1F6-S13, 15.1R7-S4; 15.1X49 versions prior to 15.1X49-D171, 15.1X49-D180; 15.1X53 versions prior to 15.1X53-D497, 15.1X53-D69; 16.1 versions prior to 16.1R7-S5; 16.2 versions prior to 16.2R2-S9; 17.1 versions prior to 17.1R3; 17.2 versions prior to 17.2R1-S8, 17.2R2-S7, 17.2R3-S1; 17.3 versions prior to 17.3R3-S6; 17.4 versions prior to 17.4R1-S7, 17.4R2-S4, 17.4R3; 18.1 versions prior to 18.1R3-S5; 18.2 versions prior to 18.2R1-S5, 18.2R2-S3, 18.2R3; 18.3 versions prior to 18.3R1-S3, 18.3R2, 18.3R3; 18.4 versions prior to 18.4R1-S2, 18.4R2.

Scores

CVSS scores of CVE-2019-0047, by who scored it
Scored byCVSSScoreVector
juniperCNA (assigner)3.1High8.8CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVDNVD · Modified3.1High8.8CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS (exploitation in 30 days)
1.6% · top 25% of all CVEs (5 Nov 2026)
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.8.

Weakness

Affected products

  • Juniper Networks · Junos OS

    • affected 12.1X46 – < 12.1X46-D86
    • affected 12.3 – < 12.3R12-S13
    • affected 12.3X48 – < 12.3X48-D80
    • affected 14.1X53 – < 14.1X53-D51
    • affected 15.1 – < 15.1F6-S13, 15.1R7-S4
    • affected 15.1X49 – < 15.1X49-D171, 15.1X49-D180
    • affected 15.1X53 – < 15.1X53-D497, 15.1X53-D69
    • affected 16.1 – < 16.1R7-S5
    • affected 16.2 – < 16.2R2-S9
    • affected 17.1 – < 17.1R3
    • affected 17.2 – < 17.2R1-S8, 17.2R2-S7, 17.2R3-S1
    • affected 17.3 – < 17.3R3-S6
    • affected 17.4 – < 17.4R1-S7, 17.4R2-S4, 17.4R3
    • affected 18.1 – < 18.1R3-S5
    • affected 18.2 – < 18.2R1-S5, 18.2R2-S3, 18.2R3
    • affected 18.3 – < 18.3R1-S3, 18.3R2, 18.3R3
    • affected 18.4 – < 18.4R1-S2, 18.4R2

What to do

Solution: The following software releases have been updated to resolve this specific issue: 12.1X46-D86, 12.3R12-S13, 12.3X48-D80, 14.1X53-D51, 15.1F6-S13, 15.1R7-S4, 15.1X49-D171, 15.1X49-D180, 15.1X53-D497, 15.1X53-D69, 16.1R7-S5, 16.2R2-S9, 17.1R3, 17.2R1-S8, 17.2R2-S7, 17.2R3-S1, 17.3R3-S6, 17.4R1-S7, 17.4R2-S4, 17.4R3, 18.1R3-S5, 18.2R1-S5, 18.2R2-S3, 18.2R3, 18.3R1-S3, 18.3R2, 18.4R1-S2, 18.4R2, 19.1R1, and all subsequent releases.

Workaround: Disable J-Web. Limit access to the Junos device to only trusted hosts and networks.

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 .