cvedb.io
CVE-2021-31355
HIGH · CVSS 8
EPSS exploitation probability: 0%
Published 2021-10-19T19:15:08.837 · Last modified 2026-06-17T03:51:36.613

Summary

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 vers

Affected products

juniper — junos

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.