CVE-2026-8599Disclosure

LOWCVSS 6.4 · MEDIUM

Exploit discussion active in current signal (1 latest mentions)

Immediate actions

Hunt for exploitation attempts and persistence artifacts
Increase monitoring for publicly documented tradecraft
Track advisory updates for patch or workaround availability

Recommended action window: High priority (within 72h)

NVD description

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.

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1.5/ 10 priority

Sources & remediation

Other references

Weakness type (CWE)

CWE-79

Priority

LOW

Exploitation

NONE

PoC

YES

Patch

NONE

Momentum

STABLE

Threat summary

Public PoC is present in monitored signal
3 mentions across 2 observed days
Momentum state: stable

What's happening

PoC mentioned or linked in 1 signal
Technical details provided in 3 signals
Disclosure: 2 classified signals
Peaked 1d ago at 2 mentions (2026-06-09); latest day: 1
3 total mentions across 2 days

Deep dive

Activity timeline3 mentions / 2d

Signal classification2 categories

Disclosure

266.7%

PoC

133.3%

Referenced assets3 URLs

By indicator

Classification over time

Date	Total	Labels

2026-06-09	2	Disclosure2
2026-06-10	1	PoC1

Full discourse3 posts

Atomic Edge@atomicedgeWAF136d
PoC
https://atomicedge.io/cve-proof/cve-2026-8599-mailerpress-version-2-0-4-medium-vulnerability-proof-of-concept CVE-2026-8599 mailerpress (CVSS Score 6.4) #WordPress plugin #vulnerability #cybersecurity #wordpressfirewall #wordpresssecurity #hacking #wpsecurity #atomicedge
Post summary
The post announces a proof‑of‑concept for CVE‑2026‑8599 in MailerPress, providing the CVE ID, affected version, and CVSS score, but does not detail an active exploit or mitigation.
0000032
7 followersView on X
Infoflowcloud@infoflowcloud137d
Disclosure
🚨*CVE* CVE-2026-8599 The MailerPress – Email Marketing, Newsletter, Email Automation & WooCommerce Emails plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Campaign HTML… https://www.cve.org/CVERecord?id=CVE-2026-8599 ----- Traducción: CVE-2026-8599 El … http://infoflow.cloud`
Post summary
The tweet announces CVE‑2026‑8599, noting it as a stored XSS issue in the MailerPress WordPress plugin via campaign HTML, without any PoC, exploit code, active Attack reports, or mitigation details.
0000029
79 followersView on X
CVE@CVEnew137d
Disclosure
CVE-2026-8599 The MailerPress – Email Marketing, Newsletter, Email Automation & WooCommerce Emails plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Campaign HTML… https://www.cve.org/CVERecord?id=CVE-2026-8599
Post summary
The message announces a stored XSS vulnerability (CVE-2026-8599) in the MailerPress WordPress plugin, providing a technical description but no PoC, exploit, or patch details.
00000154
57.6K followersView on X

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