CVE-2026-1890 LeadConnector < 3.0.22 - Unauthenticated Rest Call

Q: What is CVE-2026-1890?

CVE-2026-1890 is a medium-severity missing authorization vulnerability in Unknown LeadConnector, published on 26 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Q: Is CVE-2026-1890 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-1890 exists.

Q: How do I fix CVE-2026-1890?

No fix has been published for CVE-2026-1890 yet. Limit exposure of the affected software until one is available.

Medium 5.3 Published 26 Mar 2026 Updated 26 Mar 2026

Unauthenticated attackers can overwrite existing data via an unprotected REST route in the LeadConnector WordPress plugin.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-1890?

CVE-2026-1890 is a medium-severity missing authorization vulnerability in Unknown LeadConnector, published on 26 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

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

Which versions are affected by CVE-2026-1890?

How do I fix CVE-2026-1890?

No fix has been published for CVE-2026-1890 yet. Limit exposure of the affected software until one is available.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2026-1890 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-1890 exists.

Public exploit code: 1 Nuclei template.

Sources

Also known as GHSA-795h-9vq2-6x3x.