CVE-2026-27353

High

Published: 05 March 2026

Published

05 March 2026

Modified

22 April 2026

KEV Added

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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 0.0004 14.4th percentile

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

Summary

CVE-2026-27353 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 Drive-by Compromise (T1189); ranked at the 14.4th 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-15 (Information Output Filtering).

Deeper analysis

CVE-2026-27353 is an Improper Neutralization of Input During Web Page Generation vulnerability, classified as Reflected Cross-site Scripting (XSS) under CWE-79, in the Grand News WordPress theme by ThemeGoods. This issue affects Grand News versions from an unspecified starting point through 3.4.3. The vulnerability was published on 2026-03-05.

The CVSS v3.1 base score is 7.1 (AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L), indicating network accessibility, low attack complexity, no required privileges, user interaction needed, and changed scope with low impacts to confidentiality, integrity, and availability. Remote attackers without authentication can exploit it by tricking users into interacting with malicious input reflected in web pages generated by the theme.

Advisories and mitigation details are documented by Patchstack at https://patchstack.com/database/Wordpress/Theme/grandnews/vulnerability/wordpress-grand-news-magazine-newspaper-wordpress-theme-3-4-3-reflected-cross-site-scripting-xss-vulnerability?_s_id=cve.

EU & UK References

🇪🇺 ENISA EUVD: EUVD-2026-9619

Vulnerability details

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in ThemeGoods Grand News grandnews allows Reflected XSS.This issue affects Grand News: from n/a through <= 3.4.3.

CWE(s): CWE-79

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1189 Drive-by Compromise Initial Access

Adversaries may gain access to a system through a user visiting a website over the normal course of browsing.

attack.mitre.org →

T1204.001 Malicious Link Execution

An adversary may rely upon a user clicking a malicious link in order to gain execution.

attack.mitre.org →

Why these techniques?

Reflected XSS enables crafting malicious links to the vulnerable public site; user interaction with the reflected payload executes arbitrary browser scripts, directly mapping to drive-by compromise and malicious link user execution.

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