# CVE-2026-116863: Tribulant Software Newsletters cross-site request forgery

Source: https://junglewise.ai/threats/cve-2026-116863-cross-site-request-forgery-csrf-vulnerability-in-tribulant  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-27. Updated: 2026-10-27  
License: CC BY 4.0 with a link back

CVE-2026-116863 · Severity: critical · CVSS 9.6 · Published 2026-10-27

Tribulant Software Newsletters is a WordPress plugin for managing email newsletters and subscriber lists. A cross-site request forgery (CSRF) vulnerability allows attackers to trick authenticated site administrators into unintended actions, such as modifying newsletter settings or subscriber data. Exploitation requires tricking an administrator into visiting a malicious page while logged in.

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-2026-116863 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-116863 being exploited in the wild.

**How severe is CVE-2026-116863?** Critical severity, with a CVSS score of 9.6, published 27 October 2026.

**Which products and versions are affected?** Tribulant Software Newsletters through 4.18.2.

**Is there a fix for CVE-2026-116863?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-116863 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-116863?** 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.

## Technical details

The vulnerability is a CSRF flaw in the Newsletters plugin through version 4.18.2 that lacks proper anti-CSRF token validation on sensitive actions. An unauthenticated attacker can craft a malicious page that, when visited by a logged-in administrator or user, triggers unwanted administrative actions without explicit consent. Successful exploitation requires user interaction (clicking a link or visiting a crafted page).

## Affected products

- Tribulant Software Newsletters through 4.18.2

## Timeline

- 2026-08-21: disclosed: Reported by wackydawg
- 2026-10-27: advisory

## References

- [https://wordpress.org/plugins](https://wordpress.org/plugins)
- [https://patchstack.com/database/wordpress/plugin/newsletters-lite/vulnerability/wordpress-newsletters-plugin-4-18-2-cross-site-request-forgery-csrf-vulnerability?_s_id=cve](https://patchstack.com/database/wordpress/plugin/newsletters-lite/vulnerability/wordpress-newsletters-plugin-4-18-2-cross-site-request-forgery-csrf-vulnerability?_s_id=cve)

## Related threats

- [Tribulant Newsletters object injection via PHP deserialization](https://junglewise.ai/threats/cve-2026-94075-deserialization-of-untrusted-data-vulnerability-in-tribulant)
- [Tribulant Newsletters SQL injection](https://junglewise.ai/threats/cve-2026-111402-improper-neutralization-of-special-elements-used-in-an-sql)