CVE-2022-22181Network attack vector

Session script execution via reflected J-Web input

Published Apr 14, 2022 · Updated Sep 17, 2024

Reflected XSS in J-Web in Juniper Networks Junos OS allows remote authenticated users to run scripts in another user's browser session. The component returns attacker-controlled input in a J-Web response without adequate output neutralization; Juniper has not identified the handler or parameter. Exploitation requires J-Web to be enabled and a victim to load the crafted content, enabling actions with that victim's J-Web permissions.

CVSS severity8.0
High
EPSS probability0.69%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Reflected XSS in J-Web in Juniper Networks Junos OS allows remote authenticated users to run scripts in another user's browser session. The component returns attacker-controlled input in a J-Web response without adequate output neutralization; Juniper has not identified the handler or parameter. Exploitation requires J-Web to be enabled and a victim to load the crafted content, enabling actions with that victim's J-Web permissions.

The record

CVE
CVE-2022-22181
Published
Apr 14, 2022
Updated
Sep 17, 2024
Vendor
Juniper Networks
Product
Junos OS
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 14, 2022CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=18.4 <18.4R3-S9
  2. Affected versionversion=19.1 <19.1R3-S6
  3. Affected versionversion=19.2 <19.2R3-S3
  4. Affected versionversion=19.3 <19.3R2-S6, 19.3R3-S3
  5. Affected versionversion=19.4 <19.4R3-S5
  6. Affected versionversion=20.1 <20.1R3-S4
  7. Affected versionversion=20.2 <20.2R3-S2
  8. Affected versionversion=20.3 <20.3R3
  9. Affected versionversion=20.4 <20.4R3
  10. Affected versionversion=21.1 <21.1R1-S1, 21.1R2
  11. Affected versionversion=unspecified <18.3R3-S5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Juniper Networks · Junos OSversion=18.4 <18.4R3-S9; version=19.1 <19.1R3-S6; version=19.2 <19.2R3-S3; version=19.3 <19.3R2-S6, 19.3R3-S3; version=19.4 <19.4R3-S5; version=20.1 <20.1R3-S4; version=20.2 <20.2R3-S2; version=20.3 <20.3R3; version=20.4 <20.4R3; version=21.1 <21.1R1-S1, 21.1R2; version=unspecified <18.3R3-S5

Published CVSS scores

3.5NIST NVDAV:N/AC:M/Au:S/C:N/I:P/A:N
8.0Juniper Networks, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo