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CVE-2026-8599

MailerPress <= 2.0.4 - Authenticated (Author+) Stored Cross-Site Scripting via Campaign HTML Content Field

Published: Jun 9, 2026Updated: Jun 9, 2026 Sources: CVE List NVD
NVD MITRE
6.4CVSS
MEDIUM

The MailerPress – Email Marketing, Newsletter, Email Automation & WooCommerce Emails plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Campaign HTML Content Field in all versions up to, and including, 2.0.4 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with author-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The public-facing campaign preview endpoint (/mp-email/{id}-slug/) is not affected by this vulnerability, as it applies a Content-Security-Policy header blocking all inline scripts; exploitation is limited to the admin dashboard preview.

EPSS Score
N/A
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available

CVSS Vector Breakdown

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

Weaknesses

CWE-79

Affected Products

MailerPress – Email Marketing, Newsletter, Email Automation & WooCommerce Emails
mailerpress

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/mailerpress/tags/2.0.3/src/Actions/Shortcodes/CampaignEmail.php#L161
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/browser/mailerpress/tags/2.0.3/src/Api/Campaigns.php#L2100
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/browser/mailerpress/tags/2.0.3/src/Api/Campaigns.php#L2128
plugins.trac.wordpress.org
and 8 more references View all →

Timeline

Published
Jun 9, 2026
Last Updated
Jun 9, 2026

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