CVE-2020-28351: mitel shoretel_firmware

Modified

Published 09-11-2020Last modified 04-08-2024

Vulnerability summary

CVE-2020-28351 is a medium (CVSS 6.1) vulnerability in mitel shoretel_firmware. EPSS estimates a 15.99% chance of exploitation in the next 30 days, higher than 96.9% of scored vulnerabilities. 2 public exploits are recorded.

Priority

Routine

Not severe (CVSS 6.1, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?

CVSS score

6.1/10

010

Medium · v3.1 (NVD)

EPSS score

15.99%

0%100%

Medium · 0.00 pp in 30 days

KEVNot listedNot listed by any tracked catalog.

RansomwareNot flaggedNo ransomware use recorded.

Public exploits2reference, exploit-database

Timeline

09-11-2020
PublishedVulnerability first disclosed.
04-08-2024
Last modifiedVulnerability information updated.

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.

CVSS metrics

2 scores · 1 source · 2 versions

v3.16.1v2.04.3

EPSS trend

Probability

15.99%

Chance of exploitation in the next 30 days

Percentile

97%

Versus all other CVEs

30-day change

No change 0.00 pp

From 15.99% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs

CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

2 found

referenceUnverified
Exploit Reference (packetstormsecurity.com)
Maturity: unknown
exploit-databasephpUnverified
ShoreTel Conferencing 19.46.1802.0 - Reflected Cross-Site Scripting
Maturity: poc

Weaknesses

CWE · root cause

CWE-79Improper Neutralization of Input During Web Page GenerationThe product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

Affected systems

Version check

Known conditions: network-reachable, no authentication, user interaction (CVSS vector). Other conditions: not stated in public data.

Mitel1 product

shoretel_firmware19.46.1802.0

1 vendor · 1 product

References

3 links

www.mitel.com/articles/what-happened-shoretel-productsX Refsource MISCVendor Advisory
github.com/dievus/cve-2020-28351X Refsource MISCThird Party Advisory
packetstormsecurity.com/files/159987/ShoreTel-Conferencing-19.46.1802.0-Cross-Site-Scripting.htmlX Refsource MISCExploitThird Party Advisory