Junos OS: Path traversal vulnerability in J-Web

published 2022-10-18 4 y ago modified 2026-06-17 4 mo ago also EUVD-2022-27392

cvss: 4.3; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.8%; EPSS 0.8% chance of exploitation in 30 days, percentile 55%
public exploits: 0; none known

A Path Traversal vulnerability in the J-Web component of Juniper Networks Junos OS allows an authenticated attacker to upload arbitrary files to the device by bypassing validation checks built into Junos OS. The attacker should not be able to execute the file due to validation checks built into Junos OS. Successful exploitation of this vulnerability could lead to loss of filesystem integrity. This issue affects Juniper Networks Junos OS: all versions prior to 19.1R3-S9; 19.2 versions prior to 19.2R3-S6; 19.3 versions prior to 19.3R3-S7; 19.4 versions prior to 19.4R3-S9; 20.1 versions prior to 20.1R3-S5; 20.2 versions prior to 20.2R3-S5; 20.3 versions prior to 20.3R3-S5; 20.4 versions prior to 20.4R3-S4; 21.1 versions prior to 21.1R3-S2; 21.2 versions prior to 21.2R3-S1; 21.3 versions prior to 21.3R2-S2, 21.3R3; 21.4 versions prior to 21.4R1-S2, 21.4R2-S1, 21.4R3; 22.1 versions prior to 22.1R1-S1, 22.1R2.

Patch / fix

fixed in 1

Juniper Networks Junos OS 19.1R3-S9, 19.2R3-S6, 19.3R3-S7, 19.4R3-S9, 20.1R3-S5, 20.2R3-S5, 20.3R3-S5, 20.4R3-S4, 21.1R3-S2, 21.2R3-S1, 21.3R2-S2, 21.3R3, 21.4R1-S2, 21.4R2-S1, 21.4R3, 22.1R1-S1, 22.1R2

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 18 mo ago (2025-05-09)

Exploit prediction

0.76% chance of exploitation in the next 30 days, higher than 55% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	4.3	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Affected products

Juniper Networks Junos OS

Classification

Weakness

CWE-23 Relative Path Traversal
CWE-22 Improper Limitation of a Pathname to a Restricted Directory

References

kb.juniper.net /JSA69899
vendor-advisory

Sources

CVE List CVE-2022-22245
NVD CVE-2022-22245

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Summary