CVE-2025-26978

High

Published: 15 March 2025

Published

15 March 2025

Modified

23 April 2026

KEV Added

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Patch

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CVSS Score v3.1 8.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:L

EPSS Score 0.0005 16.3th percentile

Risk Priority 17 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2025-26978 is a high-severity SQL Injection (CWE-89) vulnerability. Its CVSS base score is 8.5 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 16.3th 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 RA-5 (Vulnerability Monitoring and Scanning) and SI-10 (Information Input Validation).

Deeper analysis

CVE-2025-26978 is an improper neutralization of special elements used in an SQL command, classified as an SQL injection vulnerability (CWE-89), affecting the FS Poster WordPress plugin developed by fs-code. This issue impacts all versions of FS Poster from n/a through 6.5.8. Published on 2025-03-15, it carries a CVSS v3.1 base score of 8.5 (AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:L), reflecting high severity due to network accessibility, low attack complexity, and significant confidentiality impact.

Low-privileged authenticated users (PR:L) can exploit this vulnerability remotely over the network without requiring user interaction. Exploitation enables attackers to extract highly sensitive data from the database (C:H) and cause low-level availability disruption (A:L), with the attack propagating across a security scope change (S:C) to potentially affect other components.

The Patchstack advisory at https://patchstack.com/database/Wordpress/Plugin/fs-poster/vulnerability/wordpress-fs-poster-plugin-6-5-8-sql-injection-vulnerability?_s_id=cve details this SQL injection vulnerability in the FS Poster plugin up to version 6.5.8.

EU & UK References

🇪🇺 ENISA EUVD: EUVD-2025-6649

Vulnerability details

Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in fs-code FS Poster fs-poster.This issue affects FS Poster: from n/a through <= 6.5.8.

CWE(s): CWE-89

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 →

T1213.006 Databases Collection

Adversaries may leverage databases to mine valuable information.

attack.mitre.org →

Why these techniques?

The SQL injection vulnerability in a public-facing WordPress plugin directly enables remote exploitation of public-facing applications (T1190) and facilitates unauthorized collection of sensitive data from the database (T1213.006).

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