CVE-2026-0800

High

Published: 24 January 2026

Published

24 January 2026

Modified

15 April 2026

KEV Added

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Patch

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CVSS Score 7.2 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

EPSS Score 0.0015 34.7th percentile

Risk Priority 14 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2026-0800 is a high-severity Cross-site Scripting (CWE-79) vulnerability in Wordpress (inferred from references). Its CVSS base score is 7.2 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 34.7th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

Threat & Defense at a Glance

What attackers do: exploitation maps to Exploit Public-Facing Application (T1190).

Threat & Defense Details

Likely Mitigating ControlsAI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

CA-8 Penetration Testing

addresses: CWE-79

Penetration testing submits XSS payloads to web applications, detecting cross-site scripting flaws for subsequent remediation.

SI-10 Information Input Validation

addresses: CWE-79

Validates web inputs to reject script-related content that could produce XSS.

SI-15 Information Output Filtering

addresses: CWE-79

Output validation against expected content can reject or sanitize script content in generated web pages, reducing XSS exploitability.

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access

Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.

attack.mitre.org →

Why these techniques?

Stored XSS in public-facing WordPress plugin directly enables exploitation of a web application (T1190) via unauthenticated script injection leading to client-side execution and impacts like session hijacking.

Confidence: HIGH · MITRE ATT&CK Enterprise v18.1

NVD Description

The User Submitted Posts – Enable Users to Submit Posts from the Front End plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the custom fields in all versions up to, and including, 20251210 due to insufficient input sanitization…

and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Deeper analysisAI

CVE-2026-0800 is a stored cross-site scripting (XSS) vulnerability, classified under CWE-79, in the User Submitted Posts – Enable Users to Submit Posts from the Front End plugin for WordPress. It affects all versions up to and including 20251210 due to insufficient input sanitization and output escaping of custom fields. This flaw enables the injection of arbitrary web scripts into pages, with a CVSS v3.1 base score of 7.2 (AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N).

Unauthenticated attackers can exploit the vulnerability by submitting posts containing malicious scripts via custom fields. The injected scripts are stored persistently and execute in users' browsers whenever they access the affected pages, potentially leading to session hijacking, defacement, or theft of sensitive data from authenticated users.

Mitigation is addressed in the plugin patch at https://plugins.trac.wordpress.org/changeset/3436859/user-submitted-posts. Security practitioners should update to a version beyond 20251210 and review the Wordfence threat intelligence details at https://www.wordfence.com/threat-intel/vulnerabilities/id/1ec907bc-bd10-4dc5-be35-4f2aaf5ef444?source=cve for additional remediation guidance.