Auth bypass in Kboard

CVE-2026-88910

The kboard WordPress plugin before 6.7 does not verify ownership or context before deleting board media, allowing unauthenticated attackers to permanently delete its uploaded media files and their database records by iterating identifiers.

Vulnerability class: IDOR (Insecure Direct Object Reference)

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-2026-88910: held from 0.003 to 0.003.

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

Affected products

  • Kboard

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-88910?
CVE-2026-88910 is a medium-severity vulnerability in Kboard, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 5.3/10. Published 2026-09-16.
How severe is CVE-2026-88910?
Medium severity. CVSS v3 base score is 5.3 out of 10.