CVE-2021-31373

HIGH

Juniper Junos OS on SRX Series - Authenticated Stored Cross-Site Scripting in J-Web Interface

Title source: llm
STIX 2.1

Description

A persistent Cross-Site Scripting (XSS) vulnerability in Juniper Networks Junos OS on SRX Series, J-Web interface may allow a remote authenticated user to inject persistent and malicious scripts. An attacker can exploit this vulnerability to steal sensitive data and credentials from a web administration session, or hijack another user's active session to perform administrative actions. This issue affects: Juniper Networks Junos OS on SRX Series: 18.2 versions prior to 18.2R3-S8; 18.3 versions prior to 18.3R3-S5; 18.4 versions prior to 18.4R3-S8; 19.1 versions prior to 19.1R3-S5; 19.2 versions prior to 19.2R1-S7, 19.2R3-S3; 19.3 versions prior to 19.3R2-S6, 19.3R3-S3; 19.4 versions prior to 19.4R1-S4, 19.4R2-S4, 19.4R3-S3; 20.1 versions prior to 20.1R2-S2, 20.1R3; 20.2 versions prior to 20.2R3-S1; 20.3 versions prior to 20.3R2-S1, 20.3R3.

References (1)

Core 1
Core References
Vendor Advisory x_refsource_confirm
https://kb.juniper.net/JSA11238

Scores

CVSS v3 8.0
EPSS 0.0028
EPSS Percentile 51.4%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

Details

CWE
CWE-20 CWE-79
Status published
Products (3)
juniper/junos 18.2 (23 CPE variants)
juniper/junos 18.3 (18 CPE variants)
juniper/junos 18.4 (9 CPE variants)
Published Oct 19, 2021
Tracked Since Feb 18, 2026