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CVE-2026-3090

Post SMTP <= 3.8.0 - Unauthenticated Stored Cross-Site Scripting via 'event_type'

Published: Mar 18, 2026Updated: Apr 22, 2026 Sources: CVE List NVDCWE-79
NVD MITRE
7.2CVSSHIGH
EPSS Score
0.2%
Top 86.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available

Description

The Post SMTP – Complete Email Deliverability and SMTP Solution with Email Logs, Alerts, Backup SMTP & Mobile App plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘event_type’ parameter in all versions up to, and including, 3.8.0 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The vulnerability is only exploitable when the Post SMTP Pro plugin is also installed and its Reporting and Tracking extension is enabled.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:CC:LI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:NAvailability
None
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Weaknesses

CWE-79

Affected Products

Post SMTP – Complete Email Deliverability and SMTP Solution with Email Logs, Alerts, Backup SMTP & Mobile Appsaadiqbal
Mixed
Web & CMS Plugins / wordpress-plugin
saadiqbalindividual-devWeb & CMS Pluginsaka post smtp – complete email deliverability and smtp solution with email logs, alerts, backup smtp & mobile app, advanced file manager – ultimate file manager for wordpress and document library solution, points management system for gamification, ranks, badges, and loyalty rewards program – mycred

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

MITRE ATT&CK

2 techniques
Execution
Initial Access
View detailed technique mapping

References

https://plugins.trac.wordpress.org/browser/post-smtp/trunk/Postman/PostmanEmailLogs.php#L459
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/changeset/3484515/
plugins.trac.wordpress.org
https://www.wordfence.com/threat-intel/vulnerabilities/id/3f8cbbbb-2089-4966-8fd3-da4f76fb2517?source=cve
wordfence.com

Timeline

Published
Mar 18, 2026
Last Updated
Apr 22, 2026

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