What is CVE-2026-1890?

CVE-2026-1890 is a medium-severity vulnerability in Leadconnector, classified under CWE-862 MISSING AUTHORIZATION. CVSS score: 5.3/10. Published 2026-03-26.

How severe is CVE-2026-1890?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Leadconnector

CVE-2026-1890

The LeadConnector WordPress plugin before 3.0.22 does not have authorization in a REST route, allowing unauthenticated users to call it and overwrite existing data

Published 2026-03-26 · last modified 2026-06-17.

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: 0.007 (50.8th percentile), scored 2026-10-05.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 50.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Leadconnector — versions 0

References

wpscan.com/vulnerability/9b88be70-b5cc-4a3f-a871-64d61cb02076/ (technical-description, exploit, vdb-entry)

Frequently asked questions

What is CVE-2026-1890?: CVE-2026-1890 is a medium-severity vulnerability in Leadconnector, classified under CWE-862 MISSING AUTHORIZATION. CVSS score: 5.3/10. Published 2026-03-26.
How severe is CVE-2026-1890?: Medium severity. CVSS v3 base score is 5.3 out of 10.