CVE-2022-22242Network attack vector

Session script execution via reflected J-Web input

Published Oct 18, 2022 · Updated May 9, 2025

Reflected XSS in J-Web in affected Juniper Networks Junos OS releases allows remote attackers to run scripts in a user's session. J-Web reflects attacker-controlled input into a page without sufficient output neutralization, causing the browser to interpret the input as script. The attacker needs no account, but a J-Web user must open the crafted request; execution remains confined to that user's J-Web browser context.

CVSS severity6.1
Medium
EPSS probability2.63%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in J-Web in affected Juniper Networks Junos OS releases allows remote attackers to run scripts in a user's session. J-Web reflects attacker-controlled input into a page without sufficient output neutralization, causing the browser to interpret the input as script. The attacker needs no account, but a J-Web user must open the crafted request; execution remains confined to that user's J-Web browser context.

The record

CVE
CVE-2022-22242
Published
Oct 18, 2022
Updated
May 9, 2025
Vendor
Juniper Networks
Product
Junos OS
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 18, 2022CVE publishedPublication date reported by the CVE source.
  2. May 9, 2025Record 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=19.2 <19.2R3-S6
  2. Affected versionversion=19.3 <19.3R3-S7
  3. Affected versionversion=19.4 <19.4R2-S7, 19.4R3-S8
  4. Affected versionversion=20.1 <20.1R3-S5
  5. Affected versionversion=20.2 <20.2R3-S5
  6. Affected versionversion=20.3 <20.3R3-S5
  7. Affected versionversion=20.4 <20.4R3-S4
  8. Affected versionversion=21.1 <21.1R3-S4
  9. Affected versionversion=21.2 <21.2R3-S1
  10. Affected versionversion=21.3 <21.3R3
  11. Affected versionversion=21.4 <21.4R2
  12. Affected versionversion=22.1 <22.1R2
  13. Affected versionversion=unspecified <19.1R3-S9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Juniper Networks · Junos OSversion=19.2 <19.2R3-S6; version=19.3 <19.3R3-S7; version=19.4 <19.4R2-S7, 19.4R3-S8; version=20.1 <20.1R3-S5; version=20.2 <20.2R3-S5; version=20.3 <20.3R3-S5; version=20.4 <20.4R3-S4; version=21.1 <21.1R3-S4; version=21.2 <21.2R3-S1; version=21.3 <21.3R3; version=21.4 <21.4R2; version=22.1 <22.1R2; version=unspecified <19.1R3-S9

Published CVSS scores

6.1Juniper Networks, Inc.CVSS:3.1/AV:N/AC:L/PR:N/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
Privilegesunauthenticated
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

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Your stack

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