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Vulnerability · Published Oct 19, 2021 · Assigned by juniper

CVE-2021-31373Junos OS: SRX Series: Persistent XSS vulnerability in J-Web

High 8.0

In plain English

A high-severity improper input validation in Junos OS from Juniper Networks. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 57% of all known vulnerabilities).

Severity (CVSS 3.1)8.0High
Exploit odds (30 days)0.8%top 43.0% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

VendorProductVersions
Juniper Networks Junos OS 18.2 – before 18.2R3-S818.3 – before 18.3R3-S518.4 – before 18.4R3-S819.1 – before 19.1R3-S519.2 – before 19.2R1-S7, 19.2R3-S319.3 – before 19.3R2-S6, 19.3R3-S319.4 – before 19.4R1-S4, 19.4R2-S4, 19.4R3-S320.1 – before 20.1R2-S2, 20.1R3

Weakness: CWE-20, CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

References