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

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Summary

CVECVE-2026-8599
StatePUBLISHED
AssignerWordfence
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-09 09:16:31 UTC
Updated2026-06-09 13:33:34 UTC
DescriptionThe 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.

Risk And Classification

Primary CVSS: v3.1 6.4 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

EPSS: 0.002520000 probability, percentile 0.162330000 (date 2026-06-15)

Problem Types: CWE-79 | CWE-79 CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary6.4MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
3.1CNADECLARED6.4MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Mailerpress MailerPress Email Marketing Newsletter Email Automation WooCommerce Emails affected 2.0.4 semver Not specified

References

ReferenceSourceLinkTags
plugins.trac.wordpress.org/browser/mailerpress/trunk/src/Api/Campaigns.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/mailerpress/tags/2.0.3/src/Api/Campaigns.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/mailerpress/trunk/src/Api/Campaigns.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/mailerpress/tags/2.0.5/src/Api/Campaigns.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/mailerpress/tags/2.0.3/src/Api/Campaigns.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/mailerpress/tags/2.0.5/src/Api/Campaigns.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/mailerpress/tags/2.0.3/src/Api/Campaigns.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/mailerpress/trunk/src/Actions/Shortcodes/CampaignEmai... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/mailerpress/tags/2.0.3/src/Actions/Shortcodes/Campaig... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/mailerpress/trunk/src/Api/Campaigns.php [email protected] plugins.trac.wordpress.org
www.wordfence.com/threat-intel/vulnerabilities/id/c52cadb2-703f-4aad-85f2-aec1d... [email protected] www.wordfence.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Faizan Shaik (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-05-14T16:37:12.000ZVendor Notified
CNA2026-06-08T19:47:21.000ZDisclosed
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