title: Junos OS: SRX Series and EX Series: J-Web doesn't sufficiently sanitize input to prevent XSS
description: An Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in J-Web of Juniper Networks Junos OS on SRX Series and EX Series allows an attacker to construct a URL that when visited by another user enables the attacker to execute commands with the target's permissions, including an administrator.
A specific invocation of the emit_debug_note method in webauth_operation.php will echo back the data it receives.
This issue affects Juniper Networks Junos OS on SRX Series and EX Series:
*  All versions earlier than 20.4R3-S10;
*  21.2 versions earlier than 21.2R3-S8;
*  21.4 versions earlier than 21.4R3-S6;
*  22.1 versions earlier than 22.1R3-S5;
*  22.2 versions earlier than 22.2R3-S3;
*  22.3 versions earlier than 22.3R3-S2;
*  22.4 versions earlier than 22.4R3-S1;
*  23.2 versions earlier than 23.2R2;
*  23.4 versions earlier than 23.4R2.
problem types: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
affected:
{
defaultStatus: unaffected
platforms: [SRX Series, EX Series]
product: Junos OS
vendor: Juniper Networks
versions:
lessThan: 20.4R3-S10, status: affected, version: 0, versionType: semver
lessThan: 21.2R3-S8, status: affected, version: 21.2, versionType: semver
lessThan: 21.4R3-S6, status: affected, version: 21.4, versionType: semver
lessThan: 22.1R3-S5, status: affected, version: 22.1, versionType: semver
lessThan: 22.2R3-S3, status: affected, version: 22.2, versionType: semver
lessThan: 22.3R3-S2, status: affected, version: 22.3, versionType: semver
lessThan: 22.4R3-S1, status: affected, version: 22.4, versionType: semver
lessThan: 23.2R2, status: affected, version: 23.2, versionType: semver
lessThan: 23.4R2, status: affected, version: 23.4, versionType: semver
}
metrics:
cvssV3_1: [
attackComplexity: LOW
attackVector: NETWORK
availabilityImpact: HIGH
baseScore: 8.8
baseSeverity: HIGH
confidentialityImpact: HIGH
integrityImpact: HIGH
privilegesRequired: NONE
scope: UNCHANGED
userInteraction: REQUIRED
vectorString: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
version: 3.1
]
format: CVSS
scenarios: GENERAL
exploits: Juniper SIRT is not aware of any malicious exploitation of this vulnerability.
solutions: The following software releases have been updated to resolve this specific issue: 20.4R3-S10*, 21.2R3-S8*, 21.4R3-S6*, 22.1R3-S5*, 22.2R3-S3*, 22.3R3-S2*, 22.4R3-S1*, 23.2R2*, 23.4R2*, 24.2R1*, and all subsequent releases.
* Pending Publication
workarounds: Disable J-Web, or limit access to only trusted hosts and users.