CVE-2020-28351

Name: CVE-2020-28351
Creator: NVD / NIST
Published: 2020-11-09T04:15:12.207+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 15.99%

Last modified Jun 17, 2026

CVE-2020-28351 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. 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.. EPSS estimates a 15.99% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

6.1/10

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

EPSS Probability

15.99%

96.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Mitel	Shoretel Firmware	19.46.1802.0

References

http://packetstormsecurity.com/files/159987/ShoreTel-Conferencing-19.46.1802.0-Cross-Site-Scripting.htmlExploit, Third Party Advisory
https://github.com/dievus/cve-2020-28351Third Party Advisory
https://www.mitel.com/articles/what-happened-shoretel-productsVendor Advisory
http://packetstormsecurity.com/files/159987/ShoreTel-Conferencing-19.46.1802.0-Cross-Site-Scripting.htmlExploit, Third Party Advisory
https://github.com/dievus/cve-2020-28351Third Party Advisory
https://www.mitel.com/articles/what-happened-shoretel-productsVendor Advisory

Timeline

Published: Nov 9, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-28351?

How severe is CVE-2020-28351?

CVE-2020-28351 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 15.99% probability of exploitation in the next 30 days.

How do I fix CVE-2020-28351?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-28351?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST