Auth bypass in Kit (Formerly Convertkit)

CVE-2026-125439

Missing Authorization vulnerability in Kit Kit (formerly ConvertKit) convertkit allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Kit (formerly ConvertKit): from n/a through 3.5.0.

Vulnerability class: Broken Access Control

Published 2026-11-11 · last modified 2026-11-12.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

FIRST.org has not scored this CVE yet. About EPSS.

Affected products

Kit (Formerly Convertkit)

Weakness classification (CWE)

CWE-862 — Missing Authorization

Public exploits and proof-of-concept code

1 public repository with exploit or proof-of-concept code for this CVE:

kanokwut/CVE-2026-125439-poc (last pushed 2026-11-10): PoC for CVE-2026-125439: Kit (formerly ConvertKit) Member Content paywall bypass via the REST API excerpt field. Fixed in 3.5.1.

References

patchstack.com/database/wordpress/plugin/convertkit/vulnerability/wordpress-kit… (vdb-entry)

This CVE has public exploit evidence. See the latest CVEs with public exploits.