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CVE-2020-1607

Junos OS: Cross-Site Scripting (XSS) in J-Web

High7.5EPSS 0.88%
Published
Updated
Reserved
Assigned by
juniper

Description

Insufficient Cross-Site Scripting (XSS) protection in J-Web may potentially allow a remote attacker to inject web script or HTML, hijack the target user's J-Web session and perform administrative actions on the Junos device as the targeted user. This issue affects Juniper Networks Junos OS 12.3 versions prior to 12.3R12-S15; 12.3X48 versions prior to 12.3X48-D86, 12.3X48-D90 on SRX Series; 14.1X53 versions prior to 14.1X53-D51 on EX and QFX Series; 15.1F6 versions prior to 15.1F6-S13; 15.1 versions prior to 15.1R7-S5; 15.1X49 versions prior to 15.1X49-D181, 15.1X49-D190 on SRX Series; 15.1X53 versions prior to 15.1X53-D238 on QFX5200/QFX5110 Series; 15.1X53 versions prior to 15.1X53-D592 on EX2300/EX3400 Series; 16.1 versions prior to 16.1R4-S13, 16.1R7-S5; 16.2 versions prior to 16.2R2-S10; 17.1 versions prior to 17.1R2-S11, 17.1R3-S1; 17.2 versions prior to 17.2R1-S9, 17.2R3-S2; 17.3 versions prior to 17.3R2-S5, 17.3R3-S5; 17.4 versions prior to 17.4R2-S6, 17.4R3; 18.1 versions prior to 18.1R3-S7; 18.2 versions prior to 18.2R2-S5, 18.2R3; 18.3 versions prior to 18.3R1-S6, 18.3R2-S1, 18.3R3; 18.4 versions prior to 18.4R1-S5, 18.4R2; 19.1 versions prior to 19.1R1-S2, 19.1R2.

Scores

CVSS scores of CVE-2020-1607, by who scored it
Scored byCVSSScoreVector
juniperCNA (assigner)3.1High7.5CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
NVDNVD · Modified3.1Medium6.1CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
EPSS (exploitation in 30 days)
0.88% · top 41% of all CVEs (6 Nov 2026)
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.

Weakness

Affected products

  • Juniper Networks · Junos OS

    • affected 17.2R2
    • affected 12.3 – < 12.3R12-S15
    • affected 15.1F6 – < 15.1F6-S13
    • affected 15.1 – < 15.1R7-S5
    • affected 16.1 – < 16.1R4-S13, 16.1R7-S5
    • affected 16.2 – < 16.2R2-S10
    • affected 17.1 – < 17.1R2-S11, 17.1R3-S1
    • affected 17.2 – < 17.2R1-S9, 17.2R3-S2
    • affected 17.3 – < 17.3R2-S5, 17.3R3-S5
    • affected 17.4 – < 17.4R2-S6, 17.4R3
    • affected 18.1 – < 18.1R3-S7
    • affected 18.2 – < 18.2R2-S5, 18.2R3
    • affected 18.3 – < 18.3R1-S6, 18.3R2-S1, 18.3R3
    • affected 18.4 – < 18.4R1-S5, 18.4R2
    • affected 19.1 – < 19.1R1-S2, 19.1R2

  • Juniper Networks · Junos OS

    • affected 12.3X48 – < 12.3X48-D86, 12.3X48-D90
    • affected 15.1X49 – < 15.1X49-D181, 15.1X49-D190

  • Juniper Networks · Junos OS

    • affected 14.1X53 – < 14.1X53-D51

  • Juniper Networks · Junos OS

    • affected 15.1X53 – < 15.1X53-D238

  • Juniper Networks · Junos OS

    • affected 15.1X53 – < 15.1X53-D592

What to do

Solution: The following software releases have been updated to resolve this specific issue: 12.3R12-S15, 12.3X48-D86, 12.3X48-D90, 14.1X53-D51, 15.1F6-S13,15.1R7-S5, 15.1X49-D181, 15.1X49-D190, 15.1X53-D238, 15.1X53-D592, 16.1R4-S13, 16.1R7-S5, 16.2R2-S10,17.1R2-S11, 17.1R3-S1, 17.2R1-S9, 17.2R3-S2, 17.3R2-S5, 17.3R3-S5, 17.4R2-S6, 17.4R3, 18.1R3-S7,18.2R2-S5, 18.2R3, 18.3R1-S6, 18.3R2-S1, 18.3R3, 18.4R1-S5, 18.4R2, 19.1R1-S2, 19.1R2, 19.2R1, and all subsequent releases.

Workaround: Access the J-Web service from trusted hosts which may not be compromised by cross-site scripting attacks, for example, deploying jump hosts with no internet access. Alternatively, disable J-Web.

References (1)

Sources

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

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Record last updated .