# CVE-2026-105318: Datasolution AcyMailing SMTP Newsletter reflected cross-site scripting

Source: https://junglewise.ai/threats/cve-2026-105318-improper-neutralization-of-input-during-web-page-generation  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-09. Updated: 2026-10-16  
License: CC BY 4.0 with a link back

CVE-2026-105318 · Severity: high · CVSS 7.1 · Published 2026-10-09

AcyMailing SMTP Newsletter is a WordPress plugin for email newsletters and subscriber management. A reflected cross-site scripting (XSS) vulnerability allows attackers to inject malicious scripts that could steal visitor data or hijack user accounts when victims click on crafted links. Users must click a malicious link for the attack to succeed, but the vulnerability affects unauthenticated users.

Technologies: [Datasolution AcyMailing SMTP Newsletter](https://junglewise.ai/threats/technologies/datasolution-acymailing-smtp-newsletter). Vendors: [Datasolution](https://junglewise.ai/threats/vendors/datasolution).

## Quick answers

**Is CVE-2026-105318 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-105318 being exploited in the wild.

**How severe is CVE-2026-105318?** High severity, with a CVSS score of 7.1, published 9 October 2026.

**Which products and versions are affected?** Datasolution AcyMailing SMTP Newsletter through 11.1.0.

**Is there a fix for CVE-2026-105318?** Yes: fixed in 11.1.1 and later. Until then: Update to version 11.1.1 or later immediately. If you cannot update right away, Patchstack offers a mitigation rule to block attacks against this vulnerability until patching is completed. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-105318 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-105318?** Check whether you run Datasolution AcyMailing SMTP Newsletter at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in 11.1.1 and later

Update to version 11.1.1 or later immediately. If you cannot update right away, Patchstack offers a mitigation rule to block attacks against this vulnerability until patching is completed.

## Technical details

The plugin fails to properly neutralize user input during web page generation, allowing reflected XSS attacks. An unauthenticated attacker can craft a malicious link that, when clicked by a user, injects arbitrary JavaScript into the page. This requires user interaction but no authentication, making it a practical vector for widespread exploitation.

## Affected products

- Datasolution AcyMailing SMTP Newsletter through 11.1.0

## Timeline

- 2026-10-09: disclosed: Vulnerability published
- 2026-10-07: patched: Patched version 11.1.1 released
- 2026-09-30: other: Reported by Peter Tang

## References

- [https://wordpress.org/plugins](https://wordpress.org/plugins)
- [https://patchstack.com/database/wordpress/plugin/acymailing/vulnerability/wordpress-acymailing-smtp-newsletter-plugin-11-1-0-cross-site-scripting-xss-vulnerability?_s_id=cve](https://patchstack.com/database/wordpress/plugin/acymailing/vulnerability/wordpress-acymailing-smtp-newsletter-plugin-11-1-0-cross-site-scripting-xss-vulnerability?_s_id=cve)

## Related threats

- [AcyMailing SMTP Newsletter arbitrary file deletion](https://junglewise.ai/threats/cve-2026-95588-unauthenticated-arbitrary-file-deletion-in-acymailing-smtp)
- [AcyMailing SMTP Newsletter remote code execution](https://junglewise.ai/threats/cve-2026-94389-unauthenticated-remote-code-execution-rce-in-acymailing-smtp)