CVE-2026-22504

High

Published: 25 March 2026

Published

25 March 2026

Modified

24 April 2026

KEV Added

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Patch

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CVSS Score v3.1 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Score 0.0050 39.1th percentile

Risk Priority 55 floored blend · peak EPSS

Summary

CVE-2026-22504 is a high-severity PHP Remote File Inclusion (CWE-98) vulnerability. Its CVSS base score is 8.1 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 39.1th 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-2026-22504 is an Improper Control of Filename for Include/Require Statement in PHP Program vulnerability, classified under CWE-98 and described as enabling PHP Local File Inclusion, in the ThemeREX ProLingua WordPress theme. It affects ProLingua versions from an unspecified starting point through 1.1.12. The issue was published on 2026-03-25 with a CVSS v3.1 base score of 8.1 (AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H).

The vulnerability can be exploited remotely by unauthenticated attackers over the network without requiring user interaction, though it demands high attack complexity. Successful exploitation grants high-impact access to confidentiality, integrity, and availability, potentially allowing attackers to include and execute arbitrary local files on the server.

Mitigation details are available in the Patchstack advisory at https://patchstack.com/database/Wordpress/Theme/prolingua/vulnerability/wordpress-prolingua-theme-1-1-12-local-file-inclusion-vulnerability?_s_id=cve.

OWASP Top 10 for Web (2025)

EU & UK References

🇪🇺 ENISA EUVD: EUVD-2026-15512

Vulnerability details

Improper Control of Filename for Include/Require Statement in PHP Program ('PHP Remote File Inclusion') vulnerability in ThemeREX ProLingua prolingua allows PHP Local File Inclusion.This issue affects ProLingua: from n/a through <= 1.1.12.

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?

CVE enables exploitation of a public-facing WordPress application (T1190) via LFI, directly facilitating data collection from local system files such as configs or source code (T1005).

Confidence: HIGH · MITRE ATT&CK Enterprise v19.0