Is CVE-2026-1503 actively exploited?

No active exploitation of CVE-2026-1503 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-1503 be exploited remotely?

Yes. CVE-2026-1503 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-1503?

CVE-2026-1503 has a CVSS score of 4.3 (MEDIUM).

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MEDIUM

CVE-2026-1503

CWE-352Published: March 21, 2026· Updated: Mar 23, 2026

4.3

CVSS v3.1

EPSS:0.01%probability of exploitation in 30 daysPercentile:1.8th

Official Description

The login_register plugin for WordPress is vulnerable to Cross-Site Request Forgery to Stored Cross-Site Scripting in all versions up to, and including, 1.2.0. This is due to missing nonce validation on the settings page and insufficient input sanitization and output escaping on the 'login_register_login_post' parameter. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page via a forged request granted they can trick an administrator into performing an action such as clicking on a link.

NVD Source

Technical Analysis

CVE-2026-1503 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.