CVE-2026-8599 json
MailerPress <= 2.0.4 - Authenticated (Author+) Stored Cross-Site Scripting via Campaign HTML Content Field
published 2026-06-09 5 mo ago modified 2026-07-23 3 mo ago also EUVD-2026-35377
- cvss
- 6.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 14%
- public exploits
- 0
- none known
Summary
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.
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 5 mo ago
Exploit prediction
0.23% chance of exploitation in the next 30 days, higher than 14% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N |
Affected products
- mailerpress MailerPress – Email Marketing, Newsletter, Email Automation & WooCommerce Emails
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/c52cadb2-703f-4aad-85f2-aec1dd4befdc?source=cve
- plugins.trac.wordpress.org /browser/mailerpress/tags/2.0.3/src/Api/Campaigns.php#L2128
- plugins.trac.wordpress.org /browser/mailerpress/tags/2.0.3/src/Api/Campaigns.php#L2100
- plugins.trac.wordpress.org /browser/mailerpress/tags/2.0.3/src/Api/Campaigns.php#L2137
- plugins.trac.wordpress.org /browser/mailerpress/tags/2.0.3/src/Actions/Shortcodes/CampaignEmail.php#L161
- plugins.trac.wordpress.org /browser/mailerpress/trunk/src/Api/Campaigns.php#L2128
- plugins.trac.wordpress.org /browser/mailerpress/trunk/src/Api/Campaigns.php#L2100
- plugins.trac.wordpress.org /browser/mailerpress/trunk/src/Api/Campaigns.php#L2137
- plugins.trac.wordpress.org /browser/mailerpress/trunk/src/Actions/Shortcodes/CampaignEmail.php#L161
- plugins.trac.wordpress.org /browser/mailerpress/tags/2.0.5/src/Api/Campaigns.php#L4713
- plugins.trac.wordpress.org /browser/mailerpress/tags/2.0.5/src/Api/Campaigns.php#L2229
Sources
- CVE List CVE-2026-8599
- NVD CVE-2026-8599
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.