Auth bypass in Arvow Ai Seo Writer

CVE-2026-16257

The Arvow AI SEO Writer WordPress plugin before 1.5.4 does not properly restrict access to one of its REST endpoints, whose only access control can be bypassed by unauthenticated users through type juggling when the Arvow AI SEO Writer WordPress plugin before 1.5.4 has not been configured, allowing them to create arbitrary posts and pages and to disclose author account and taxonomy information.

Vulnerability class: Broken Authentication

Published · last modified .

CVSS v3 metric

CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N.

EPSS exploit prediction

EPSS: 0.003 (17.4th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 17th percentile — 17.4% 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-2026-16257: held from 0.003 to 0.003.

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

Affected products

  • Arvow Ai Seo Writer — versions 0

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-16257?
CVE-2026-16257 is a high-severity vulnerability in Arvow Ai Seo Writer, classified under Improper Authentication. CVSS score: 8.2/10. Published 2026-08-10.
How severe is CVE-2026-16257?
High severity. CVSS v3 base score is 8.2 out of 10.