8.0
HIGH
CVE-2021-31355
Juniper Networks Junos OS Persistent XSS Vulnerability
Description

A persistent cross-site scripting (XSS) vulnerability in the captive portal graphical user interface of Juniper Networks Junos OS may allow a remote authenticated user to inject web script or HTML and steal sensitive data and credentials from a web administration session, possibly tricking a follow-on administrative user to perform administrative actions on the device. This issue affects Juniper Networks Junos OS: All versions, including the following supported releases: 12.3X48 versions prior to 12.3X48-D105; 15.1X49 versions prior to 15.1X49-D220; 18.3 versions prior to 18.3R3-S5; 18.4 versions prior to 18.4R3-S9; 19.1 versions prior to 19.1R3-S7; 19.2 versions prior to 19.2R3-S3; 19.3 versions prior to 19.3R3-S4; 19.4 versions prior to 19.4R3-S6; 20.1 versions prior to 20.1R3; 20.2 versions prior to 20.2R1-S1, 20.2R2; 20.3 versions prior to 20.3R2; 20.4 versions prior to 20.4R2; 21.1 versions prior to 21.1R2.

INFO

Published Date :

Oct. 19, 2021, 7:15 p.m.

Last Modified :

Oct. 25, 2021, 9:59 p.m.

Remotely Exploitable :

Yes !

Impact Score :

5.9

Exploitability Score :

2.1
Affected Products

The following products are affected by CVE-2021-31355 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Juniper junos
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2021-31355.

URL Resource
https://kb.juniper.net/JSA11220 Patch Vendor Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2021-31355 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2021-31355 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • Initial Analysis by [email protected]

    Oct. 25, 2021

    Action Type Old Value New Value
    Added CVSS V2 Metadata Victim must voluntarily interact with attack mechanism
    Added CVSS V2 NIST (AV:N/AC:M/Au:S/C:N/I:P/A:N)
    Added CVSS V3.1 NIST AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
    Changed Reference Type https://kb.juniper.net/JSA11220 No Types Assigned https://kb.juniper.net/JSA11220 Patch, Vendor Advisory
    Added CWE NIST CWE-79
    Added CPE Configuration OR *cpe:2.3:o:juniper:junos:12.3x48:-:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:12.3x48:d10:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:12.3x48:d100:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:12.3x48:d15:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:12.3x48:d20:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:12.3x48:d25:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:12.3x48:d30:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:12.3x48:d35:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:12.3x48:d40:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:12.3x48:d45:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:12.3x48:d50:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:12.3x48:d51:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:12.3x48:d55:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:12.3x48:d60:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:12.3x48:d65:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:12.3x48:d66:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:12.3x48:d70:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:12.3x48:d75:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:12.3x48:d80:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:12.3x48:d85:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:12.3x48:d90:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:12.3x48:d95:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:15.1x49:-:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:15.1x49:d10:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:15.1x49:d100:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:15.1x49:d110:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:15.1x49:d120:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:15.1x49:d130:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:15.1x49:d131:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:15.1x49:d140:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:15.1x49:d15:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:15.1x49:d150:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:15.1x49:d160:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:15.1x49:d170:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:15.1x49:d180:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:15.1x49:d190:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:15.1x49:d20:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:15.1x49:d200:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:15.1x49:d210:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:15.1x49:d25:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:15.1x49:d30:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:15.1x49:d35:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:15.1x49:d40:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:15.1x49:d45:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:15.1x49:d50:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:15.1x49:d55:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:15.1x49:d60:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:15.1x49:d65:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:15.1x49:d70:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:15.1x49:d75:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:15.1x49:d80:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:15.1x49:d90:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:18.3:-:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:18.3:r1:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:18.3:r1-s1:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:18.3:r1-s2:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:18.3:r1-s3:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:18.3:r1-s4:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:18.3:r1-s5:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:18.3:r1-s6:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:18.3:r2:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:18.3:r2-s1:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:18.3:r2-s2:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:18.3:r2-s3:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:18.3:r3:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:18.3:r3-s1:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:18.3:r3-s2:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:18.4:-:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:18.4:r1:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:18.4:r1-s1:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:18.4:r1-s2:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:18.4:r1-s3:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:18.4:r1-s4:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:18.4:r1-s5:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:18.4:r1-s6:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:18.4:r1-s7:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:18.4:r2:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:18.4:r2-s1:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:18.4:r2-s2:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:18.4:r2-s3:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:18.4:r2-s4:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:18.4:r3:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:18.4:r3-s1:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:18.4:r3-s2:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:18.4:r3-s3:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:19.1:-:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:19.1:r1:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:19.1:r1-s1:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:19.1:r1-s2:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:19.1:r1-s3:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:19.1:r1-s4:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:19.1:r1-s5:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:19.1:r2:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:19.1:r2-s1:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:19.1:r3:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:19.1:r3-s1:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:19.2:-:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:19.2:r1:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:19.2:r1-s1:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:19.2:r1-s2:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:19.2:r1-s3:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:19.2:r1-s4:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:19.2:r2:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:19.2:r2-s1:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:19.3:-:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:19.3:r1:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:19.3:r1-s1:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:19.3:r2:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:19.3:r2-s1:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:19.3:r2-s2:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:19.3:r2-s3:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:19.4:r1:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:19.4:r1-s1:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:19.4:r1-s2:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:19.4:r2:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:19.4:r2-s1:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:20.1:r1:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:20.1:r1-s1:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:20.1:r1-s2:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:20.1:r1-s3:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:20.1:r1-s4:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:20.1:r2:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:20.1:r2-s1:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:20.1:r2-s2:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:20.2:r1:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:20.2:r2:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:20.3:r1:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:20.3:r1-s1:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:20.4:r1:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:20.4:r1-s1:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:21.1:r1:*:*:*:*:*:* *cpe:2.3:o:juniper:junos:21.1:r1-s1:*:*:*:*:*:*
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2021-31355 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2021-31355 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.07 }} 0.00%

score

0.27236

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability