CVE-2026-102562
HighCVSS 7.2Exploitation Probability (EPSS)
Low risk15th percentile - higher than 15% of all known CVEs
Summary
The AcyMailing plugin for WordPress in versions up to and including 11.1.0 is vulnerable to Stored Cross-Site Scripting via the customField[] parameter of the public frontusers::subscribe endpoint. The acym_cleanVar() sanitizer only strips complete HTML tags, and SubscriberInsertion::replaceUserInformation() together with the archive view template insert the stored subscriber field value into the mail body without HTML encoding. This allows an unauthenticated attacker to inject arbitrary scripts that execute when the online-archive URL for the poisoned subscriber is accessed.
Risk Assessment
An attacker can execute arbitrary JavaScript in a victim's browser, including an administrator clicking the plugin-generated link in the Subscribers → History screen, potentially leading to session hijacking or actions with administrator privileges.
Recommendation
Update the AcyMailing plugin to a version later than 11.1.0; if not possible, restrict access to the public subscription endpoint and verify proper HTML encoding in archive templates.
Other vulnerabilities in AcyMailing
See all- CVE-2026-77807High
The AcyMailing plugin for WordPress is vulnerable to Directory Traversal in all versions up to, and including, 11.0.4 via the `user[name]` parameter. This allows unauthenticated attackers to read arbitrary files on the server. Exploitation requires the "Embed images" option to be enabled.
- CVE-2026-15426High
The AcyMailing plugin for WordPress up to version 10.11.1 has an authorization bypass vulnerability. An authenticated attacker with subscriber-level access can overwrite the BCC field of the acy_notification_cms notification template, causing WordPress password reset emails, including those for administrators, to be silently copied to an attacker-controlled address, enabling account takeover.
- CVE-2026-56292High
A SQL Injection vulnerability in the AcyMailing extension for Joomla versions below 10.11.1 allows unauthorized database access and data leakage.
- CVE-2026-12170Medium
The AcyMailing plugin for WordPress up to version 10.10.2 is vulnerable to Stored Cross-Site Scripting via the 'alignment' attribute due to insufficient input sanitization and output escaping. Authenticated attackers with contributor-level access or higher can inject arbitrary web scripts that execute whenever a user accesses an injected page.
Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS