CVE-2026-102562High· 7.2▾ Twilight

The AcyMailing plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the customField[] parameter of the public frontusers::subscribe endpoint in versions up to, and including, 11.1.0

▾ Twilight zone — High severity, or a signal on a lesser flaw

Depth score40/ 100 · Moderate

impact 39.6 · likelihood 0 · exploitation 0

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Proof of concept

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Published

Oct 13, 2026

Updated

Oct 15, 2026

CVSS

7.2

Vendor

acyba

Product

AcyMailing – An Ultimate Newsletter Plugin and Marketing Automation Solution for WordPress

CWE

CWE-79

Depth score

40 · Moderate

EPSS

0.25% · p16

Platforms

—

Source

NVD

Vector

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

CISA SSVC

decided 2026-10-15

Exploitation: none
Automatable: no
Technical impact: partial

Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.

EPSS history

Exploit-prediction probability, daily snapshots since Oct 13.

0.2% → 0.2%

Timeline

Disclosure to exploitation, from the record and what we observed since indexing it.

3 events · 2 days

Oct 13, 2026Published
Disclosed via NVD
Oct 13, 2026EPSS first tracked
0.2%
Oct 15, 2026Record revised
Last analysed / modified upstream

acyba CWE-79 #nvd #cve.org

Affected

acymailing_an_ultimate_newsletter_plugin_and_marketing_automation_solution_for_wordpress <= 11.1.0

Full technical detail▾

Overview

The AcyMailing plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the customField[] parameter of the public frontusers::subscribe endpoint in versions up to, and including, 11.1.0. This is due to insufficient input sanitization and output escaping in the acym_cleanVar() sanitizer, whose HTML-tag stripper only matches complete tags (requiring a closing '>'), together with SubscriberInsertion::replaceUserInformation() and the archive view template, which substitute the stored subscriber field value into the mail body and emit it without HTML encoding. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses the online-archive URL for the poisoned subscriber, including administrators who click the plugin-generated link in the Subscribers → History screen.

Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

References

Related vulnerabilities

Connected by shared product, vendor, weakness, or advisory.

#nvd#cve.org

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