XSS in Narrative Publisher

CVE-2026-16273

The Narrative Publisher WordPress plugin through 1.0.7 does not restrict write access to a REST-exposed post meta field or escape it when rendering, allowing users with contributor-level access and above to store JavaScript that executes in the browser of any higher-privileged user who views the affected post.

Vulnerability class: XSS (Cross-Site Scripting)

Published · last modified .

CVSS v3 metric

CVSS v3 base score 4.6 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.002 (13.3th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 13th percentile — 13.3% 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-2026-16273: held from 0.002 to 0.002.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

  • Narrative Publisher — versions 0

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-16273?
CVE-2026-16273 is a medium-severity vulnerability in Narrative Publisher, classified under Cross-site Scripting. CVSS score: 4.6/10. Published 2026-08-02.
How severe is CVE-2026-16273?
Medium severity. CVSS v3 base score is 4.6 out of 10.