Auth bypass in Eventin

CVE-2026-77702

The Eventin WordPress plugin before 4.1.24 does not prevent the token issued to a guest at checkout from being used to change that order's tickets afterwards, allowing unauthenticated users to replace a paid ticket with a free one and complete the order at no charge.

Vulnerability class: Broken Access Control

Published · last modified .

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:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.003 (23.1th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 23rd percentile — 23.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-77702: held from 0.003 to 0.003.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

  • Eventin

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-77702?
CVE-2026-77702 is a medium-severity vulnerability in Eventin, classified under Missing Authorization. CVSS score: 5.3/10. Published 2026-09-16.
How severe is CVE-2026-77702?
Medium severity. CVSS v3 base score is 5.3 out of 10.