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Vulnerability record · CVE-2021-28975 · published 21 October 2021

CVE-2021-28975: Wpmailster wp mailster cross-site scripting vulnerability

Wpmailster · Wp Mailster

WP Mailster 1.6.18.0 allows XSS when a victim opens a mail server's details in the mst_servers page, for a crafted server_host, server_name, or connection_parameter parameter.

6.1 CVSS 3.1 Medium EPSS 0.90% · top 42.1% CWE-79 · Cross-site scripting
6.1CVSS 3.1 base score, v2 4.3
0.90%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

WP Mailster 1.6.18.0 allows XSS when a victim opens a mail server's details in the mst_servers page, for a crafted server_host, server_name, or connection_parameter parameter.

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.

References

LinkTags
https://www.compass-security.com/en/research/advisories/ Third Party Advisory
https://www.compass-security.com/fileadmin/Research/Advisories/2021-18_CSNC-2021-018-WPMailster_XSS_CSRF.txt ExploitThird Party Advisory
https://www.compass-security.com/en/research/advisories/ Third Party Advisory
https://www.compass-security.com/fileadmin/Research/Advisories/2021-18_CSNC-2021-018-WPMailster_XSS_CSRF.txt ExploitThird Party Advisory

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Related vulnerabilities

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

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Source: NIST National Vulnerability Database (record CVE-2021-28975), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.