# CVE-2026-94075: Tribulant Newsletters object injection via PHP deserialization

Source: https://junglewise.ai/threats/cve-2026-94075-deserialization-of-untrusted-data-vulnerability-in-tribulant  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-24. Updated: 2026-10-24  
License: CC BY 4.0 with a link back

CVE-2026-94075 · Severity: critical · CVSS 9.8 · Published 2026-10-24

The Tribulant Newsletters plugin for WordPress allows attackers to inject arbitrary objects through unsafe deserialization of untrusted data, enabling remote code execution on affected websites. An unauthenticated attacker can exploit this to run malicious commands on the server without any special privileges or user interaction.

Technologies: [Tribulant Software Newsletters](https://junglewise.ai/threats/technologies/tribulant-software-newsletters). Vendors: [Tribulant Software](https://junglewise.ai/threats/vendors/tribulant-software).

## Quick answers

**Is CVE-2026-94075 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-94075 being exploited in the wild.

**How severe is CVE-2026-94075?** Critical severity, with a CVSS score of 9.8, published 24 October 2026.

**Which products and versions are affected?** Tribulant Software Newsletters through 4.18.1.

**Is there a fix for CVE-2026-94075?** Yes: fixed in 4.18.2 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-94075 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-94075?** Check whether you run Tribulant Software Newsletters 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 4.18.2 or later

## Technical details

A PHP object injection vulnerability in Newsletters through 4.18.1 stems from unsafe deserialization of untrusted input, allowing attackers to instantiate arbitrary objects and trigger harmful actions. The vulnerability is unauthenticated, network-accessible, and can lead to remote code execution. The vulnerability is resolved in version 4.18.2.

## Affected products

- Tribulant Software Newsletters through 4.18.1

## Timeline

- 2026-10-24: disclosed
- 2026-10-22: patched: version 4.18.2 released
- 2026-10-22: advisory: Patchstack advisory published

## References

- [https://wordpress.org/plugins](https://wordpress.org/plugins)
- [https://patchstack.com/database/wordpress/plugin/newsletters-lite/vulnerability/wordpress-newsletters-plugin-4-18-1-php-object-injection-vulnerability?_s_id=cve](https://patchstack.com/database/wordpress/plugin/newsletters-lite/vulnerability/wordpress-newsletters-plugin-4-18-1-php-object-injection-vulnerability?_s_id=cve)

## Related threats

- [Tribulant Software Newsletters cross-site request forgery](https://junglewise.ai/threats/cve-2026-116863-cross-site-request-forgery-csrf-vulnerability-in-tribulant)
- [Tribulant Newsletters SQL injection](https://junglewise.ai/threats/cve-2026-111402-improper-neutralization-of-special-elements-used-in-an-sql)