What is CVE-2026-116863?

CVE-2026-116863 is a critical-severity vulnerability in Tribulant Software Newsletters, classified under Cross-Site Request Forgery (CSRF). CVSS score: 9.6/10. Published 2026-10-27.

How severe is CVE-2026-116863?

Critical severity. CVSS v3 base score is 9.6 out of 10.

CSRF in Tribulant Software Newsletters

CVE-2026-116863

Cross-Site Request Forgery (CSRF) vulnerability in Tribulant Software Newsletters newsletters-lite allows Cross Site Request Forgery.This issue affects Newsletters: from n/a through 4.18.2.

Vulnerability class: CSRF (Cross-Site Request Forgery)

Published 2026-10-27.

CVSS v3 metric

CVSS v3 base score 9.6 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Tribulant Software Newsletters

Weakness classification (CWE)

CWE-352 — Cross-Site Request Forgery (CSRF)

References

patchstack.com/database/wordpress/plugin/newsletters-lite/vulnerability/wordpre… (vdb-entry)

Frequently asked questions

What is CVE-2026-116863?: CVE-2026-116863 is a critical-severity vulnerability in Tribulant Software Newsletters, classified under Cross-Site Request Forgery (CSRF). CVSS score: 9.6/10. Published 2026-10-27.
How severe is CVE-2026-116863?: Critical severity. CVSS v3 base score is 9.6 out of 10.