TI-2024-20227 Aliases CVE-2024-30503 GHSA-327x-6c4p-8g25

WordPress Mailster plugin <= 4.0.6 - Reflected Cross Site Scripting (XSS) vulnerability

LOW 32CWE-79Published 2024-03-29 · Updated 2026-04-28

Key facts

Attack vector: Network
Privileges required: None
User interaction: Required
Attack complexity: Low
Impact type: Cross-site scripting
Confidentiality · integrity · availability: Low · Low · Low
Fix status: No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in EverPress Mailster mailster.This issue affects Mailster: from n/a through <= 4.0.6.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00426 37th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
EverPress	Mailster	up to 4.0.6	—	No fix listed	CNA

Mailster VendorEverPress Affected up to 4.0.6 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:mailster:mailster::::::wordpress::*	before 4.0.7	Vulnerable	Mailster

cpe:2.3:a:mailster:mailster:*:*:*:*:*:wordpress:*:* Versions before 4.0.7 Vulnerable ·Mailster

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2024-30503
2026-10-03 Alias added: GHSA-327x-6c4p-8g25

References

Advisory 1

https://patchstack.com/database/vulnerability/mailster/wordpress-mailster-plugin-4-0-6-reflected-cross-site-scripting-xss-vulnerability?_s_id=cve

Other 1

https://patchstack.com/database/Wordpress/Plugin/mailster/vulnerability/wordpress-mailster-plugin-4-0-6-reflected-cross-site-scripting-xss-vulnerability?_s_id=cve

TI-2026-21524 WordPress Mailster plugin <= 4.1.17 - Arbitrary File Upload vulnerability CVSS 3.1CRITICAL 9.1
TI-2024-21410 WordPress Mailster plugin <= 4.0.6 - Unauthenticated Local File Inclusion vulnerability CVSS 3.1HIGH 8.1
TI-2025-39646 WordPress Mailster plugin < 4.1.14 - Cross Site Scripting (XSS) vulnerability CVSS 3.1HIGH 7.1
TI-2025-26150 WordPress BruteGuard – Brute Force Login Protection plugin <= 0.1.4 - Reflected Cross Site Scripting (XSS) vulnerability CVSS 3.1HIGH 7.1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences