Vulnerability record · CVE-2020-28351 · published 9 November 2020

CVE-2020-28351: Mitel shoretel firmware cross-site scripting vulnerability

Mitel · Shoretel Firmware

The conferencing component on Mitel ShoreTel 19.46.1802.0 devices could allow an unauthenticated attacker to conduct a reflected cross-site scripting (XSS) attack (via the PATH_INFO to index.php) due to insufficient validation for the time_zone object in the HOME_MEETING& page.

6.1 CVSS 3.1 Medium EPSS 16% · top 3.2% CWE-79 · Cross-site scripting

6.1CVSS 3.1 base score, v2 4.3

16%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

6References, 2 tagged exploit

17 Jun 2026Last modified by NVD

Description

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

Shoretel Firmware Mitel

References

Link	Tags
http://packetstormsecurity.com/files/159987/ShoreTel-Conferencing-19.46.1802.0-Cross-Site-Scripting.html	ExploitThird Party Advisory
https://github.com/dievus/cve-2020-28351	Third Party Advisory
https://www.mitel.com/articles/what-happened-shoretel-products	Vendor Advisory
http://packetstormsecurity.com/files/159987/ShoreTel-Conferencing-19.46.1802.0-Cross-Site-Scripting.html	ExploitThird Party Advisory
https://github.com/dievus/cve-2020-28351	Third Party Advisory
https://www.mitel.com/articles/what-happened-shoretel-products	Vendor Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2020-28351), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.