Auth bypass in Eventin

CVE-2026-13169

The Eventin WordPress plugin before 4.1.21 does not properly verify ownership of events before allowing them to be modified, deleted, or reassigned to a different author, allowing users with contributor-level access and above to alter, delete, or take over events created by other users including administrators.

Vulnerability class: IDOR (Insecure Direct Object Reference)

Published · last modified .

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.004 (26.3th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 26th percentile — 26.3% 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-2026-13169: held from 0.002 to 0.004.

EPSS over last 30 days · oldest: 0.002 · newest: 0.004 · change: +0.001

Affected products

  • Eventin

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-13169?
CVE-2026-13169 is a high-severity vulnerability in Eventin, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 8.1/10. Published 2026-08-19.
How severe is CVE-2026-13169?
High severity. CVSS v3 base score is 8.1 out of 10.