CVE-2021-31355

Junos OS: Stored Cross-Site Scripting (XSS) vulnerability in captive portal

State: Published
Severity: 8.0 High
Published: Oct 19, 2021
Updated: Sep 17, 2024
Reserved: Apr 15, 2021

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.

Scores

CVSS	Score	Vector	Source
3.1	8.0 High	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H	juniper

Weaknesses

CWE-79 Cross-site Scripting (XSS)

Affected Products

Product	Versions
Junos OSJuniper Networks	12.3X48 to before 12.3X48-D105Affected 15.1X49 to before 15.1X49-D220Affected 18.3 to before 18.3R3-S5Affected 18.4 to before 18.4R3-S9Affected 19.1 to before 19.1R3-S7Affected 19.2 to before 19.2R3-S3Affected 19.3 to before 19.3R3-S4Affected 19.4 to before 19.4R3-S6Affected 20.1 to before 20.1R3Affected 20.2 to before 20.2R1-S1, 20.2R2Affected 20.3 to before 20.3R2Affected 20.4 to before 20.4R2Affected 21.1 to before 21.1R2Affected

Product

Versions

Junos OSJuniper Networks

12.3X48 to before 12.3X48-D105Affected
15.1X49 to before 15.1X49-D220Affected
18.3 to before 18.3R3-S5Affected
18.4 to before 18.4R3-S9Affected
19.1 to before 19.1R3-S7Affected
19.2 to before 19.2R3-S3Affected
19.3 to before 19.3R3-S4Affected
19.4 to before 19.4R3-S6Affected
20.1 to before 20.1R3Affected
20.2 to before 20.2R1-S1, 20.2R2Affected
20.3 to before 20.3R2Affected
20.4 to before 20.4R2Affected
21.1 to before 21.1R2Affected

References

https://kb.juniper.net/JSA11220

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