Cyber Resilience

CVE-2025-30602

High

Published: 24 March 2025

Published
24 March 2025
Modified
23 April 2026
KEV Added
—
Patch
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CVSS Score v3.1 7.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
EPSS Score 0.0009 25.0th percentile
Risk Priority 14 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2025-30602 is a high-severity Cross-site Scripting (CWE-79) vulnerability. Its CVSS base score is 7.1 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 25.0th 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-15 (Information Output Filtering).

Deeper analysis

CVE-2025-30602 is an Improper Neutralization of Input During Web Page Generation vulnerability, classified as Stored Cross-site Scripting (XSS) under CWE-79, in the WordPress plugin Related Posts via Categories developed by alphasis. The issue affects the plugin from its initial release through version 2.1.2.

Attackers can exploit this vulnerability over the network (AV:N) with low attack complexity (AC:L), no privileges required (PR:N), but it requires user interaction (UI:R). The CVSS v3.1 base score of 7.1 (S:C/C:L/I:L/A:L) indicates that exploitation, potentially via a CSRF-to-Stored XSS vector as noted in advisories, allows injection of malicious scripts that persist on the site and execute in victims' browsers when viewing affected pages, enabling low impacts on confidentiality, integrity, and availability across a changed scope.

The Patchstack advisory provides details on this CSRF-to-Stored XSS vulnerability in Related Posts via Categories version 2.1.2, including mitigation guidance.

EU & UK References

Vulnerability details

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in alphasis Related Posts via Categories related-posts-via-categories allows Stored XSS.This issue affects Related Posts via Categories: from n/a through <= 2.1.2.

CWE(s)
CWE-79

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 →
T1059.007 JavaScript Execution
Adversaries may abuse various implementations of JavaScript for execution.
attack.mitre.org →
Why these techniques?

Stored XSS in public-facing WordPress plugin enables T1190 for exploiting the web application and T1059.007 for injecting/executing malicious JavaScript in victim browsers.

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

CVEs Like This One

CVE-2026-3231Shared CWE-79
CVE-2025-23481Shared CWE-79
CVE-2025-69302Shared CWE-79
CVE-2025-23734Shared CWE-79
CVE-2025-23571Shared CWE-79
CVE-2025-65110Shared CWE-79
CVE-2026-24948Shared CWE-79
CVE-2025-27352Shared CWE-79
CVE-2025-30349Shared CWE-79
CVE-2026-3876Shared CWE-79

Affected Assets

Mitigating Controls

Mitigating Controls (NIST 800-53 r5) AI

SI-15 Information Output Filtering good match
prevent

Directly addresses stored XSS by filtering information outputs to neutralize malicious scripts before web page generation and rendering in users' browsers.

SI-10 Information Input Validation good match
prevent

Enforces validation of inputs to the WordPress plugin, preventing acceptance and storage of XSS payloads without proper neutralization.

SI-2 Flaw Remediation good match
prevent

Remediates the specific flaw in Related Posts via Categories plugin versions through <=2.1.2 by timely patching and updating to eliminate the vulnerability.

References