CVE-2026-22356

High

Published: 20 February 2026

Published

20 February 2026

Modified

15 April 2026

KEV Added

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Patch

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CVSS Score v3.1 7.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS Score 0.0014 34.4th percentile

Risk Priority 15 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2026-22356 is a high-severity PHP Remote File Inclusion (CWE-98) vulnerability. Its CVSS base score is 7.5 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 34.4th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-2 (Flaw Remediation).

Deeper analysis

CVE-2026-22356, published on 2026-02-20, is an Improper Control of Filename for Include/Require Statement in PHP Program vulnerability, referred to as PHP Remote File Inclusion but enabling PHP Local File Inclusion, in the Automattic Jetpack CRM zero-bs-crm WordPress plugin. The issue affects Jetpack CRM versions from n/a through 6.7.0 and is associated with CWE-98. It has a CVSS v3.1 base score of 7.5 (AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H).

A remote, unauthenticated attacker can exploit this vulnerability over the network, though it requires high attack complexity and user interaction. Successful exploitation allows high-impact compromise of confidentiality, integrity, and availability, potentially enabling local file inclusion to read sensitive server files.

The Patchstack advisory provides further details on this vulnerability, including mitigation guidance, at https://patchstack.com/database/Wordpress/Plugin/zero-bs-crm/vulnerability/wordpress-jetpack-crm-plugin-6-7-0-local-file-inclusion-vulnerability?_s_id=cve.

EU & UK References

🇪🇺 ENISA EUVD: EUVD-2026-8248

Vulnerability details

Improper Control of Filename for Include/Require Statement in PHP Program ('PHP Remote File Inclusion') vulnerability in Automattic Jetpack CRM zero-bs-crm allows PHP Local File Inclusion.This issue affects Jetpack CRM: from n/a through <= 6.7.0.

CWE(s): CWE-98

Related Threats

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 →

T1005 Data from Local System Collection

Adversaries may search local system sources, such as file systems, configuration files, local databases, virtual machine files, or process memory, to find files of interest and sensitive data prior to Exfiltration.

attack.mitre.org →

Why these techniques?

LFI vuln in public-facing WordPress plugin directly enables exploitation of the app (T1190) and reading of local server files (T1005).

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