Junos OS: A XSS vulnerability allows an attacker to execute commands on a target J-Web session

published 2022-04-14 4y ago modified 2026-06-17 4mo ago also EUVD-2022-27329

cvss: 8.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.7%; EPSS 0.7% chance of exploitation in 30 days, percentile 54%
public exploits: 0; none known

A Cross-site Scripting (XSS) vulnerability in Juniper Networks Junos OS J-Web allows an attacker to construct a URL that when visited by another user enables the attacker to execute commands with the target's permissions, including an administrator. This issue affects: Juniper Networks Junos OS 12.3 versions prior to 12.3R12-S19; 15.1 versions prior to 15.1R7-S10; 18.3 versions prior to 18.3R3-S5; 18.4 versions prior to 18.4R2-S10, 18.4R3-S9; 19.1 versions prior to 19.1R2-S3, 19.1R3-S6; 19.2 versions prior to 19.2R1-S8, 19.2R3-S3; 19.3 versions prior to 19.3R2-S6, 19.3R3-S3; 19.4 versions prior to 19.4R3-S5; 20.1 versions prior to 20.1R3-S2; 20.2 versions prior to 20.2R3-S2; 20.3 versions prior to 20.3R3; 20.4 versions prior to 20.4R2-S2, 20.4R3; 21.1 versions prior to 21.1R1-S1, 21.1R2; 21.2 versions prior to 21.2R1-S1, 21.2R2.

Patch / fix

fixed in 1

Juniper Networks Junos OS 12.3R12-S19, 15.1R7-S10, 18.3R3-S5, 18.4R2-S10, 18.4R3-S9, 19.1R2-S3, 19.1R3-S6, 19.2R1-S8, 19.2R3-S3, 19.3R2-S6, 19.3R3-S3, 19.4R3-S5, 20.1R3-S2, 20.2R3-S2, 20.3R3, 20.4R2-S2, 20.4R3, 21.1R1-S1, 21.1R2, 21.2R1-S1, 21.2R2

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Exploit prediction

0.73% chance of exploitation in the next 30 days, higher than 54% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
CNA	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD	3.1	6.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD	2.0	4.3	AV:N/AC:M/Au:N/C:N/I:P/A:N

Affected products

Juniper Networks Junos OS

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

References

kb.juniper.net /JSA69519
vendor-advisory

Sources

CVE List CVE-2022-22182
NVD CVE-2022-22182

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